{"id":"CVE-2026-80961","title":"kernel: dm-pcache: validate kset key_num and intra-segment bounds (CVE-2026-80961)","summary":"A flaw was found in the `dm-pcache` component of the Linux kernel. A local attacker with `CAP_SYS_ADMIN` capabilities could exploit unbounded fields decoded from the cache device. This could lead to an out-of-bounds read, potentially discl…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-125","vendor":"Red Hat","product":"Linux","affected":["Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < d8caf96040a06096276ab72f5e1e8547c014c564","Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 5ac38f4b4862fad6e7270fde5c3356a822ce74ca","Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < f11deb032fd84081e7831cffcba895d893054a22","Linux 6.18"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T08:59:42+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80961.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80961.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80961"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532021"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80961"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80961"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80961.mbox"},{"url":"https://git.kernel.org/stable/c/d8caf96040a06096276ab72f5e1e8547c014c564"},{"url":"https://git.kernel.org/stable/c/5ac38f4b4862fad6e7270fde5c3356a822ce74ca"},{"url":"https://git.kernel.org/stable/c/f11deb032fd84081e7831cffcba895d893054a22"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00173,"epssPercentile":0.05986,"scores":{"vendor":5.5,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.476Z","slug":"CVE-2026-80961","body":"## Overview\n\nA flaw was found in the `dm-pcache` component of the Linux kernel. A local attacker with `CAP_SYS_ADMIN` capabilities could exploit unbounded fields decoded from the cache device. This could lead to an out-of-bounds read, potentially disclosing sensitive information from adjacent persistent memory to user space.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80961.json)\n\n**kernel: dm-pcache: validate kset key_num and intra-segment bounds** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":202802,"id":"CVE-2026-80961","ts":1789403723672,"field":"cvss","old":"7.8","new":"5.5"},{"seq":202801,"id":"CVE-2026-80961","ts":1789403723672,"field":"severity","old":"high","new":"medium"},{"seq":183608,"id":"CVE-2026-80961","ts":1789356676085,"field":"cvss","old":"7.8","new":"2.3"},{"seq":183607,"id":"CVE-2026-80961","ts":1789356676085,"field":"severity","old":"high","new":"low"},{"seq":153146,"id":"CVE-2026-80961","ts":1789285349232,"field":"cvss","old":null,"new":"7.8"},{"seq":153145,"id":"CVE-2026-80961","ts":1789285349232,"field":"severity","old":"none","new":"high"},{"seq":109626,"id":"CVE-2026-80961","ts":1789183732698,"field":"cvss","old":null,"new":"2.3"},{"seq":109625,"id":"CVE-2026-80961","ts":1789183732698,"field":"severity","old":"none","new":"low"}]}