{ "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-2026-23415", "tracking": { "current_release_date": "2026-04-03T17:05:36.315952Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-23415", "initial_release_date": "2026-04-02T12:27:30.766239Z", "revision_history": [ { "date": "2026-04-02T12:27:30.766239Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| References created (3)." }, { "date": "2026-04-02T12:27:37.441404Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-02T12:38:45.803288Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (3).| Products connected (5).| References created (3)." }, { "date": "2026-04-02T12:38:48.353744Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:22:27.044580Z", "number": "5", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-02T15:22:36.693249Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-04-02T18:44:54.118859Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Products connected (2)." }, { "date": "2026-04-03T00:27:47.484982Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (13).| Product Identifiers created (5).| References created (3).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-04-03T00:28:00.703726Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-04-03T06:43:52.409697Z", "number": "10", "summary": "Description created for source." }, { "date": "2026-04-03T16:41:51.328323Z", "number": "11", "summary": "NCSC Score updated." } ], "status": "interim", "version": "11" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:git/c042c505210dc3453f378df432c10fff3d471bc5|<190a8c48ff623c3d67cb295b4536a660db2012aa", "product": { "name": "vers:git/c042c505210dc3453f378df432c10fff3d471bc5|<190a8c48ff623c3d67cb295b4536a660db2012aa", "product_id": "CSAFPID-5984711" } }, { "category": "product_version_range", "name": "vers:git/c042c505210dc3453f378df432c10fff3d471bc5|<7e196194ea27bd49adf3551e2aceb83498eb73fe", "product": { "name": "vers:git/c042c505210dc3453f378df432c10fff3d471bc5|<7e196194ea27bd49adf3551e2aceb83498eb73fe", "product_id": "CSAFPID-5984710" } }, { "category": "product_version_range", "name": "vers:git/c042c505210dc3453f378df432c10fff3d471bc5|<853f70c67d1b37e368fdcb3e328c4b8c04f53ac0", "product": { "name": "vers:git/c042c505210dc3453f378df432c10fff3d471bc5|<853f70c67d1b37e368fdcb3e328c4b8c04f53ac0", "product_id": "CSAFPID-5984709" } }, { "category": "product_version_range", "name": "vers:semver/6.18.21|<=6.18.*", "product": { "name": "vers:semver/6.18.21|<=6.18.*", "product_id": "CSAFPID-5984170" } }, { "category": "product_version_range", "name": "vers:semver/6.19.11|<=6.19.*", "product": { "name": "vers:semver/6.19.11|<=6.19.*", "product_id": "CSAFPID-5984171" } }, { "category": "product_version_range", "name": "vers:semver/<6.16", "product": { "name": "vers:semver/<6.16", "product_id": "CSAFPID-3063687" } }, { "category": "product_version_range", "name": "vers:unknown/6.16", "product": { "name": "vers:unknown/6.16", "product_id": "CSAFPID-3063686" } }, { "category": "product_version_range", "name": "vers:unknown/7.0-rc6|<=*", "product": { "name": "vers:unknown/7.0-rc6|<=*", "product_id": "CSAFPID-5971751" } } ], "category": "product_name", "name": "Linux" } ], "category": "vendor", "name": "Linux" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/10", "product": { "name": "vers:rpm/10", "product_id": "CSAFPID-2858634", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:10" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439321", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:6" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/7", "product": { "name": "vers:rpm/7", "product_id": "CSAFPID-1439315", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:7" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/8", "product": { "name": "vers:rpm/8", "product_id": "CSAFPID-1439317", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:8" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/9", "product": { "name": "vers:rpm/9", "product_id": "CSAFPID-1439319", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:9" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2858635" } } ], "category": "product_name", "name": "kernel" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453376" } } ], "category": "product_name", "name": "kernel" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453377" } } ], "category": "product_name", "name": "kernel" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453378" } } ], "category": "product_name", "name": "kernel-rt" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453379" } } ], "category": "product_name", "name": "kernel" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453380" } } ], "category": "product_name", "name": "kernel-rt" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453381" } } ], "category": "product_name", "name": "kernel" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453382" } } ], "category": "product_name", "name": "kernel-rt" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-2036022" } } ], "category": "product_name", "name": "linux" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-2036023" } } ], "category": "product_name", "name": "linux" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-23415", "cwe": { "id": "CWE-367", "name": "Time-of-check Time-of-use (TOCTOU) Race Condition" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()\n\nDuring futex_key_to_node_opt() execution, vma->vm_policy is read under\nspeculative mmap lock and RCU. Concurrently, mbind() may call\nvma_replace_policy() which frees the old mempolicy immediately via\nkmem_cache_free().\n\nThis creates a race where __futex_key_to_node() dereferences a freed\nmempolicy pointer, causing a use-after-free read of mpol->mode.\n\n[ 151.412631] BUG: KASAN: slab-use-after-free in __futex_key_to_node (kernel/futex/core.c:349)\n[ 151.414046] Read of size 2 at addr ffff888001c49634 by task e/87\n\n[ 151.415969] Call Trace:\n\n[ 151.416732] __asan_load2 (mm/kasan/generic.c:271)\n[ 151.416777] __futex_key_to_node (kernel/futex/core.c:349)\n[ 151.416822] get_futex_key (kernel/futex/core.c:374 kernel/futex/core.c:386 kernel/futex/core.c:593)\n\nFix by adding rcu to __mpol_put().", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23415" }, { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()\n\nDuring futex_key_to_node_opt() execution, vma->vm_policy is read under\nspeculative mmap lock and RCU. Concurrently, mbind() may call\nvma_replace_policy() which frees the old mempolicy immediately via\nkmem_cache_free().\n\nThis creates a race where __futex_key_to_node() dereferences a freed\nmempolicy pointer, causing a use-after-free read of mpol->mode.\n\n[ 151.412631] BUG: KASAN: slab-use-after-free in __futex_key_to_node (kernel/futex/core.c:349)\n[ 151.414046] Read of size 2 at addr ffff888001c49634 by task e/87\n\n[ 151.415969] Call Trace:\n\n[ 151.416732] __asan_load2 (mm/kasan/generic.c:271)\n[ 151.416777] __futex_key_to_node (kernel/futex/core.c:349)\n[ 151.416822] get_futex_key (kernel/futex/core.c:374 kernel/futex/core.c:386 kernel/futex/core.c:593)\n\nFix by adding rcu to __mpol_put().", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23415.json" }, { "category": "description", "text": "A flaw was found in the Linux kernel. A timing issue, known as a race condition, exists within the futex subsystem. This vulnerability could allow a local attacker to access memory after it has been freed, leading to a system crash (denial of service) or potentially the disclosure of sensitive information.", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23415.json" }, { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() During futex_key_to_node_opt() execution, vma->vm_policy is read under speculative mmap lock and RCU. Concurrently, mbind() may call vma_replace_policy() which frees the old mempolicy immediately via kmem_cache_free(). This creates a race where __futex_key_to_node() dereferences a freed mempolicy pointer, causing a use-after-free read of mpol->mode. [ 151.412631] BUG: KASAN: slab-use-after-free in __futex_key_to_node (kernel/futex/core.c:349) [ 151.414046] Read of size 2 at addr ffff888001c49634 by task e/87 [ 151.415969] Call Trace: [ 151.416732] __asan_load2 (mm/kasan/generic.c:271) [ 151.416777] __futex_key_to_node (kernel/futex/core.c:349) [ 151.416822] get_futex_key (kernel/futex/core.c:374 kernel/futex/core.c:386 kernel/futex/core.c:593) Fix by adding rcu to __mpol_put().", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-23415" }, { "category": "other", "text": "0.00017", "title": "EPSS" }, { "category": "other", "text": "4.0", "title": "NCSC Score" }, { "category": "other", "text": "Is related to (a version of) product Linux Kernel, The value of the most recent EPSS score, Is related to a product by vendor Linux", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-3063686", "CSAFPID-5984709", "CSAFPID-5984710", "CSAFPID-5984711", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-1453376", "CSAFPID-1453381", "CSAFPID-1453382", "CSAFPID-2858634", "CSAFPID-2858635" ], "known_not_affected": [ "CSAFPID-3063687", "CSAFPID-5971751", "CSAFPID-5984170", "CSAFPID-5984171", "CSAFPID-2036022", "CSAFPID-2036023", "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1453377", "CSAFPID-1453378", "CSAFPID-1453379", "CSAFPID-1453380" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23415" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23415.json" }, { "category": "external", "summary": "Source - 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-2026-23415" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23415.json" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/190a8c48ff623c3d67cb295b4536a660db2012aa" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/7e196194ea27bd49adf3551e2aceb83498eb73fe" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/853f70c67d1b37e368fdcb3e328c4b8c04f53ac0" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-23415" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23415" }, { "category": "external", "summary": "Reference - redhat", "url": "https://lore.kernel.org/linux-cve-announce/2026040204-CVE-2026-23415-3435@gregkh/T" } ], "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-1439319", "CSAFPID-1439321", "CSAFPID-1453376", "CSAFPID-1453381", "CSAFPID-1453382", "CSAFPID-2858634", "CSAFPID-2858635", "CSAFPID-3063686", "CSAFPID-5984709", "CSAFPID-5984710", "CSAFPID-5984711" ] } ], "title": "CVE-2026-23415" } ] }