{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "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-2026-4105",
        "tracking": {
            "current_release_date": "2026-03-27T22:46:57.374504Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-4105",
            "initial_release_date": "2026-01-10T19:28:17.442286Z",
            "revision_history": [
                {
                    "date": "2026-01-10T19:28:17.442286Z",
                    "number": "1",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-13T09:39:04.522425Z",
                    "number": "2",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-13T09:39:15.857556Z",
                    "number": "3",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T11:05:31.964735Z",
                    "number": "4",
                    "summary": "Source created.| CVE status created. (valid)| Products created (4).| References created (4)."
                },
                {
                    "date": "2026-03-13T11:05:37.252699Z",
                    "number": "5",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T11:34:52.815015Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T12:28:01.881116Z",
                    "number": "7",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (14).| Product Identifiers created (5).| Product Remediations created (16).| Products created (2).| References created (3).| CWES updated (1).| Vendor_assessment created."
                },
                {
                    "date": "2026-03-13T12:28:09.800086Z",
                    "number": "8",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T14:11:30.766784Z",
                    "number": "9",
                    "summary": "Source created.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-13T14:11:32.960834Z",
                    "number": "10",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T14:38:42.208527Z",
                    "number": "11",
                    "summary": "CVSS updated."
                },
                {
                    "date": "2026-03-13T16:39:19.864576Z",
                    "number": "12",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-13T18:43:51.587267Z",
                    "number": "13",
                    "summary": "Source created.| CVE status created. (valid)| Products connected (2)."
                },
                {
                    "date": "2026-03-13T18:43:53.638990Z",
                    "number": "14",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T20:38:50.723871Z",
                    "number": "15",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-13T20:38:53.615575Z",
                    "number": "16",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-14T06:43:50.811139Z",
                    "number": "17",
                    "summary": "Description created for source."
                },
                {
                    "date": "2026-03-14T23:27:15.375694Z",
                    "number": "18",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-17T12:19:56.924333Z",
                    "number": "19",
                    "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| CWES updated (1)."
                },
                {
                    "date": "2026-03-17T12:19:59.216955Z",
                    "number": "20",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T09:26:51.821355Z",
                    "number": "21",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-20T09:26:55.177662Z",
                    "number": "22",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T18:22:01.187671Z",
                    "number": "23",
                    "summary": "Products created (4).| Product Identifiers created (4)."
                },
                {
                    "date": "2026-03-20T18:22:04.880546Z",
                    "number": "24",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T10:07:28.440529Z",
                    "number": "25",
                    "summary": "Products connected (1).| Product Identifiers created (1).| References created (2)."
                },
                {
                    "date": "2026-03-25T10:07:32.087530Z",
                    "number": "26",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-26T08:05:38.145736Z",
                    "number": "27",
                    "summary": "References created (2)."
                },
                {
                    "date": "2026-03-26T08:05:41.192052Z",
                    "number": "28",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-26T18:54:15.043906Z",
                    "number": "29",
                    "summary": "Source connected.| CVE status created. (valid)| Description created for source.| Products connected (1).| References created (9)."
                },
                {
                    "date": "2026-03-27T09:06:35.884099Z",
                    "number": "30",
                    "summary": "References created (4)."
                },
                {
                    "date": "2026-03-27T09:06:38.190283Z",
                    "number": "31",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "31"
        }
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            "notes": [
                {
                    "category": "description",
                    "text": "A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-4105"
                },
                {
                    "category": "description",
                    "text": "A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.\nThe Red Hat Product Security team has assessed the severity of this vulnerability as Moderate due to environmental limitations on exploitability. Exploitation requires a local unprivileged user with an active logind session, such as a desktop session, which significantly reduces the attack surface compared to vulnerabilities that can be triggered remotely or through standard remote access methods such as SSH. Despite this constraint, successful exploitation results in privilege escalation to root, allowing an attacker to execute arbitrary commands and fully compromise the affected system.",
                    "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-4105"
                },
                {
                    "category": "description",
                    "text": "A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-4105"
                },
                {
                    "category": "description",
                    "text": "A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.",
                    "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-4105"
                },
                {
                    "category": "description",
                    "text": "Systemd: systemd: privilege escalation via improper access control in registermachine d-bus method",
                    "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar"
                },
                {
                    "category": "description",
                    "text": "This update for systemd fixes the following issues:\n\nSecurity issues:\n\n- CVE-2026-4105: privilege escalation due to improper access control in RegisterMachine D-Bus method (bsc#1259650).\n- CVE-2026-29111: local unprivileged user can trigger an assert in systemd (bsc#1259418).\n- udev: check for invalid chars in various fields received from the kernel (bsc#1259697).\n\nNon security issues:\n\n- Name libsystemd-{shared,core} based on the major version of systemd and the\n  package release number (bsc#1228081, bsc#1256427)\n- detect-virt: bare-metal GCE only for x86 and i386 (bsc#1254293)\n\nChangelog:\n\n- a943e3ce2f machined: reject invalid class types when registering machines\n- 71593f77db udev: fix review mixup\n- 73a89810b4 udev-builtin-net-id: print cescaped bad attributes\n- 0f360bfdc0 udev-builtin-net_id: do not assume the current interface name is ethX\n- 40905232e2 udev: ensure tag parsing stays within bounds\n- 7bce9026e3 udev: ensure there is space for trailing NUL before calling sprintf\n- d018ac1ea3 udev: check for invalid chars in various fields received from the kernel\n- aef6e11921 core/cgroup: avoid one unnecessary strjoina()\n- cc7426f38a sd-json: fix off-by-one issue when updating parent for array elements\n- 26a748f727 core: validate input cgroup path more prudently\n- 99d8308fde core/dbus-manager: propagate meaningful dbus errors from EnqueueMarkedJobs\n- 8bbac1d508 detect-virt: bare-metal GCE only for x86 and i386\n",
                    "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/SUSE%2FSUSE-SU-2026:20822-1.json?alt=media"
                },
                {
                    "category": "other",
                    "text": "0.00019",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "3.6",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "There is product data available from source Certbundde",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "Is related to a product by vendor Red Hat, The value of the most recent EPSS score, There is product data available from source Debian",
                    "title": "NCSC Score top decreasing factors"
                },
                {
                    "category": "details",
                    "text": "Severity: 2\n",
                    "title": "Vendor assessment"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5812832",
                    "CSAFPID-5812833",
                    "CSAFPID-5812834",
                    "CSAFPID-5812835",
                    "CSAFPID-1439315",
                    "CSAFPID-1439317",
                    "CSAFPID-1439319",
                    "CSAFPID-1439328",
                    "CSAFPID-1439329",
                    "CSAFPID-2858634",
                    "CSAFPID-2878767",
                    "CSAFPID-2878790",
                    "CSAFPID-2878791",
                    "CSAFPID-2878793",
                    "CSAFPID-2878794",
                    "CSAFPID-2878795",
                    "CSAFPID-2878796",
                    "CSAFPID-2878797",
                    "CSAFPID-5813408",
                    "CSAFPID-5813409",
                    "CSAFPID-1401695",
                    "CSAFPID-1401740",
                    "CSAFPID-5874047",
                    "CSAFPID-5874048",
                    "CSAFPID-5874049",
                    "CSAFPID-5874050",
                    "CSAFPID-1317174",
                    "CSAFPID-5919018"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Source raw - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/4xxx/CVE-2026-4105.json"
                },
                {
                    "category": "external",
                    "summary": "Source - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0720.json"
                },
                {
                    "category": "external",
                    "summary": "Source - redhat",
                    "url": "https://access.redhat.com/security/cve/CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Source raw - redhat",
                    "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4105.json"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Source raw - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - debian",
                    "url": "https://security-tracker.debian.org/tracker/CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Source raw - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Source - microsoft",
                    "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - osv",
                    "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/SUSE%2FSUSE-SU-2026:20822-1.json?alt=media"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://access.redhat.com/security/cve/CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447262"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde; cveprojectv5; nvd; redhat",
                    "url": "https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0720.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0720"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/systemd/systemd/security/advisories/GHSA-9mj4-rrc3-gjcx"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024838.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024839.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024899.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024898.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://www.suse.com/support/update/announcement/2026/suse-su-202620822-1/"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://bugzilla.suse.com/1228081"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://bugzilla.suse.com/1254293"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://bugzilla.suse.com/1256427"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://bugzilla.suse.com/1259418"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://bugzilla.suse.com/1259650"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://bugzilla.suse.com/1259697"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://www.suse.com/security/cve/CVE-2026-29111"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://www.suse.com/security/cve/CVE-2026-4105"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024932.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024937.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024936.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024948.html"
                }
            ],
            "remediations": [
                {
                    "category": "mitigation",
                    "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
                    "product_ids": [
                        "CSAFPID-1439315",
                        "CSAFPID-1439317",
                        "CSAFPID-1439319",
                        "CSAFPID-1439328",
                        "CSAFPID-1439329",
                        "CSAFPID-2858634",
                        "CSAFPID-2878767",
                        "CSAFPID-2878790",
                        "CSAFPID-2878791",
                        "CSAFPID-2878793",
                        "CSAFPID-2878794",
                        "CSAFPID-2878795",
                        "CSAFPID-2878796",
                        "CSAFPID-2878797",
                        "CSAFPID-5813408",
                        "CSAFPID-5813409"
                    ]
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-1317174",
                        "CSAFPID-1401695",
                        "CSAFPID-1401740",
                        "CSAFPID-1439315",
                        "CSAFPID-1439317",
                        "CSAFPID-1439319",
                        "CSAFPID-1439328",
                        "CSAFPID-1439329",
                        "CSAFPID-2858634",
                        "CSAFPID-2878767",
                        "CSAFPID-2878790",
                        "CSAFPID-2878791",
                        "CSAFPID-2878793",
                        "CSAFPID-2878794",
                        "CSAFPID-2878795",
                        "CSAFPID-2878796",
                        "CSAFPID-2878797",
                        "CSAFPID-5812832",
                        "CSAFPID-5812833",
                        "CSAFPID-5812834",
                        "CSAFPID-5812835",
                        "CSAFPID-5813408",
                        "CSAFPID-5813409",
                        "CSAFPID-5874047",
                        "CSAFPID-5874048",
                        "CSAFPID-5874049",
                        "CSAFPID-5874050",
                        "CSAFPID-5919018"
                    ]
                }
            ],
            "title": "CVE-2026-4105"
        }
    ]
}