{
    "document": {
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        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-23254",
        "tracking": {
            "current_release_date": "2026-04-02T09:56:34.429862Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
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            },
            "id": "CVE-2026-23254",
            "initial_release_date": "2026-03-18T18:26:15.517973Z",
            "revision_history": [
                {
                    "date": "2026-03-18T18:26:15.517973Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| References created (4)."
                },
                {
                    "date": "2026-03-18T18:26:18.545813Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-18T18:39:03.552716Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (5).| Products connected (6).| References created (4)."
                },
                {
                    "date": "2026-03-18T18:39:10.276713Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-19T00:28:37.527751Z",
                    "number": "5",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (13).| Product Identifiers created (5).| References created (3).| Vendor_assessment created."
                },
                {
                    "date": "2026-03-19T00:28:50.344664Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-19T00:43:41.259924Z",
                    "number": "7",
                    "summary": "Source created.| CVE status created. (valid)| Products connected (2)."
                },
                {
                    "date": "2026-03-19T06:44:24.250284Z",
                    "number": "8",
                    "summary": "Description created for source."
                },
                {
                    "date": "2026-03-19T12:05:45.041252Z",
                    "number": "9",
                    "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (28)."
                },
                {
                    "date": "2026-03-19T12:05:47.834185Z",
                    "number": "10",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-19T20:50:05.907528Z",
                    "number": "11",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (4)."
                },
                {
                    "date": "2026-03-19T20:50:09.988340Z",
                    "number": "12",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T09:55:39.330508Z",
                    "number": "13",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-20T09:55:42.728776Z",
                    "number": "14",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T01:06:48.140636Z",
                    "number": "15",
                    "summary": "Products connected (1).| References created (2)."
                },
                {
                    "date": "2026-03-25T01:06:49.870893Z",
                    "number": "16",
                    "summary": "NCSC Score updated."
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                {
                    "date": "2026-03-25T10:07:20.646279Z",
                    "number": "17",
                    "summary": "References created (1)."
                },
                {
                    "date": "2026-03-25T10:07:22.783963Z",
                    "number": "18",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-26T08:05:42.409632Z",
                    "number": "19",
                    "summary": "References created (2)."
                },
                {
                    "date": "2026-03-26T08:05:45.222638Z",
                    "number": "20",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-27T09:06:41.395390Z",
                    "number": "21",
                    "summary": "Products connected (1).| References created (4)."
                },
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                    "date": "2026-03-27T09:06:45.614743Z",
                    "number": "22",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-30T13:30:59.212451Z",
                    "number": "23",
                    "summary": "Products connected (1).| References created (2)."
                },
                {
                    "date": "2026-03-30T13:31:07.573017Z",
                    "number": "24",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-04-02T09:56:29.545140Z",
                    "number": "25",
                    "summary": "Products connected (2).| References created (2)."
                }
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            "status": "interim",
            "version": "25"
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    "vulnerabilities": [
        {
            "cve": "CVE-2026-23254",
            "notes": [
                {
                    "category": "description",
                    "text": "No description is available for this CVE.",
                    "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-23254"
                },
                {
                    "category": "description",
                    "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: fix outer network offset\n\nThe udp GRO complete stage assumes that all the packets inserted the RX\nhave the `encapsulation` flag zeroed. Such assumption is not true, as a\nfew H/W NICs can set such flag when H/W offloading the checksum for\nan UDP encapsulated traffic, the tun driver can inject GSO packets with\nUDP encapsulation and the problematic layout can also be created via\na veth based setup.\n\nDue to the above, in the problematic scenarios, udp4_gro_complete() uses\nthe wrong network offset (inner instead of outer) to compute the outer\nUDP header pseudo checksum, leading to csum validation errors later on\nin packet processing.\n\nAddress the issue always clearing the encapsulation flag at GRO completion\ntime. Such flag will be set again as needed for encapsulated packets by\nudp_gro_complete().",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-23254"
                },
                {
                    "category": "description",
                    "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: fix outer network offset\n\nThe udp GRO complete stage assumes that all the packets inserted the RX\nhave the `encapsulation` flag zeroed. Such assumption is not true, as a\nfew H/W NICs can set such flag when H/W offloading the checksum for\nan UDP encapsulated traffic, the tun driver can inject GSO packets with\nUDP encapsulation and the problematic layout can also be created via\na veth based setup.\n\nDue to the above, in the problematic scenarios, udp4_gro_complete() uses\nthe wrong network offset (inner instead of outer) to compute the outer\nUDP header pseudo checksum, leading to csum validation errors later on\nin packet processing.\n\nAddress the issue always clearing the encapsulation flag at GRO completion\ntime. Such flag will be set again as needed for encapsulated packets by\nudp_gro_complete().",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-23254"
                },
                {
                    "category": "description",
                    "text": "In the Linux kernel, the following vulnerability has been resolved:  net: gro: fix outer network offset  The udp GRO complete stage assumes that all the packets inserted the RX have the `encapsulation` flag zeroed. Such assumption is not true, as a few H/W NICs can set such flag when H/W offloading the checksum for an UDP encapsulated traffic, the tun driver can inject GSO packets with UDP encapsulation and the problematic layout can also be created via a veth based setup.  Due to the above, in the problematic scenarios, udp4_gro_complete() uses the wrong network offset (inner instead of outer) to compute the outer UDP header pseudo checksum, leading to csum validation errors later on in packet processing.  Address the issue always clearing the encapsulation flag at GRO completion time. Such flag will be set again as needed for encapsulated packets by udp_gro_complete().",
                    "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-23254"
                },
                {
                    "category": "description",
                    "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: fix outer network offset\n\nThe udp GRO complete stage assumes that all the packets inserted the RX\nhave the `encapsulation` flag zeroed. Such assumption is not true, as a\nfew H/W NICs can set such flag when H/W offloading the checksum for\nan UDP encapsulated traffic, the tun driver can inject GSO packets with\nUDP encapsulation and the problematic layout can also be created via\na veth based setup.\n\nDue to the above, in the problematic scenarios, udp4_gro_complete() uses\nthe wrong network offset (inner instead of outer) to compute the outer\nUDP header pseudo checksum, leading to csum validation errors later on\nin packet processing.\n\nAddress the issue always clearing the encapsulation flag at GRO completion\ntime. Such flag will be set again as needed for encapsulated packets by\nudp_gro_complete().",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23254"
                },
                {
                    "category": "other",
                    "text": "0.00018",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "4.6",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "Is related to an uncommon product vendor",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "Is related to (a version of) an uncommon product, The value of the most recent EPSS score, Is related to a product by vendor Linux, Is related to a product by vendor Open Source",
                    "title": "NCSC Score top decreasing factors"
                },
                {
                    "category": "details",
                    "text": "Severity: 1\n",
                    "title": "Vendor assessment"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-1286675",
                    "CSAFPID-5844899",
                    "CSAFPID-5844900",
                    "CSAFPID-5844901",
                    "CSAFPID-5844902",
                    "CSAFPID-5844903",
                    "CSAFPID-2858634",
                    "CSAFPID-2858635",
                    "CSAFPID-1330297",
                    "CSAFPID-1317174",
                    "CSAFPID-1337880",
                    "CSAFPID-1363258",
                    "CSAFPID-1330299",
                    "CSAFPID-1784861"
                ],
                "known_not_affected": [
                    "CSAFPID-1286676",
                    "CSAFPID-5585382",
                    "CSAFPID-5599072",
                    "CSAFPID-5599078",
                    "CSAFPID-5608071",
                    "CSAFPID-1439315",
                    "CSAFPID-1439317",
                    "CSAFPID-1439319",
                    "CSAFPID-1439321",
                    "CSAFPID-1453376",
                    "CSAFPID-1453377",
                    "CSAFPID-1453378",
                    "CSAFPID-1453379",
                    "CSAFPID-1453380",
                    "CSAFPID-1453381",
                    "CSAFPID-1453382",
                    "CSAFPID-2036022",
                    "CSAFPID-2036023"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Source raw - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Source raw - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23254.json"
                },
                {
                    "category": "external",
                    "summary": "Source - redhat",
                    "url": "https://access.redhat.com/security/cve/CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Source raw - redhat",
                    "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23254.json"
                },
                {
                    "category": "external",
                    "summary": "Source - debian",
                    "url": "https://security-tracker.debian.org/tracker/CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Source - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0790.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/2e5edb69e5d0e23ef248c56fc977039268c77a7b"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/5c2c3c38be396257a6a2e55bd601a12bb9781507"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/9d40a85138568696387ef04cd004c64612a70874"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://git.kernel.org/stable/c/b83557bc6f560433fe5d727e241069f8db5ba709"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23254"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031817-CVE-2026-23254-6387@gregkh/T"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0790.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0790"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031814-CVE-2025-71268-057a@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031816-CVE-2025-71269-b47d@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031816-CVE-2025-71270-19ac@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031843-CVE-2026-23249-c309@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031845-CVE-2026-23250-271e@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031845-CVE-2026-23251-259a@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031846-CVE-2026-23252-6bef@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031846-CVE-2026-23253-b1c6@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031817-CVE-2026-23254-6387@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031817-CVE-2026-23255-fc51@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031818-CVE-2026-23256-b93b@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031818-CVE-2026-23257-bd18@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031818-CVE-2026-23258-d181@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031819-CVE-2026-23259-5bd7@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031819-CVE-2026-23260-6464@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031819-CVE-2026-23261-f757@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031820-CVE-2026-23262-a421@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031820-CVE-2026-23263-5c88@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031820-CVE-2026-23264-fe5b@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031853-CVE-2026-23265-6d01@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031853-CVE-2026-23266-b57b@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031811-CVE-2026-23267-ff55@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031846-CVE-2026-23268-6be3@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031846-CVE-2026-23269-2bf7@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lore.kernel.org/linux-cve-announce/2026031847-CVE-2026-23270-cb9a@gregkh/"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024805.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024803.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024841.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024925.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024928.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024954.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024956.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024953.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://kb.igel.com/en/security-safety/current/isn-2026-07-apparmor-vulnerabilities"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/025031.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://docs.cloud.google.com/support/bulletins#gcp-2026-015"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://ubuntu.com/security/notices/USN-8141-1"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00008"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 5.5,
                        "baseSeverity": "MEDIUM"
                    },
                    "products": [
                        "CSAFPID-1286675",
                        "CSAFPID-1317174",
                        "CSAFPID-1330297",
                        "CSAFPID-1330299",
                        "CSAFPID-1337880",
                        "CSAFPID-1363258",
                        "CSAFPID-1784861",
                        "CSAFPID-2858634",
                        "CSAFPID-2858635",
                        "CSAFPID-5844899",
                        "CSAFPID-5844900",
                        "CSAFPID-5844901",
                        "CSAFPID-5844902",
                        "CSAFPID-5844903"
                    ]
                }
            ],
            "title": "CVE-2026-23254"
        }
    ]
}