{"id":"CVE-2026-80981","title":"kernel: net/smc: fix use-after-free of the LLC qentry in smc_llc_srv_add_link() (CVE-2026-80981)","summary":"A flaw was found in the Linux kernel's net/smc component. A local attacker could exploit a use-after-free vulnerability in the `smc_llc_srv_add_link()` function, where a freed memory region is improperly accessed. This can lead to memory c…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:18:50+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80981.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80981.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80981"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532104"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80981"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80981"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80981.mbox"},{"url":"https://git.kernel.org/stable/c/a42a459ef0e54cb0c4b3e43e21cb0e658e664f64"},{"url":"https://git.kernel.org/stable/c/adef84cc85d449ac28d2b4b4c49cf19619c56e27"},{"url":"https://git.kernel.org/stable/c/c52a998a223e7e84333306996edec096178d1e95"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00588,"epssPercentile":0.46866,"scores":{"vendor":5.2,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.476Z","slug":"CVE-2026-80981","body":"## Overview\n\nA flaw was found in the Linux kernel's net/smc component. A local attacker could exploit a use-after-free vulnerability in the `smc_llc_srv_add_link()` function, where a freed memory region is improperly accessed. This can lead to memory corruption and potentially result in a denial of service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80981.json)\n\n**kernel: net/smc: fix use-after-free of the LLC qentry in smc_llc_srv_add_link()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":204176,"id":"CVE-2026-80981","ts":1789490236203,"field":"cvss","old":"5.2","new":"7"},{"seq":204175,"id":"CVE-2026-80981","ts":1789490236203,"field":"severity","old":"medium","new":"high"},{"seq":202943,"id":"CVE-2026-80981","ts":1789403733048,"field":"cvss","old":"9.8","new":"5.2"},{"seq":202942,"id":"CVE-2026-80981","ts":1789403733048,"field":"severity","old":"critical","new":"medium"},{"seq":183592,"id":"CVE-2026-80981","ts":1789356676019,"field":"cvss","old":"9.8","new":"5.2"},{"seq":183591,"id":"CVE-2026-80981","ts":1789356676019,"field":"severity","old":"critical","new":"medium"},{"seq":153166,"id":"CVE-2026-80981","ts":1789285349374,"field":"cvss","old":null,"new":"9.8"},{"seq":153165,"id":"CVE-2026-80981","ts":1789285349374,"field":"severity","old":"none","new":"critical"},{"seq":147740,"id":"CVE-2026-80981","ts":1789270212107,"field":"cvss","old":null,"new":"5.2"},{"seq":147739,"id":"CVE-2026-80981","ts":1789270212107,"field":"severity","old":"none","new":"medium"},{"seq":109494,"id":"CVE-2026-80981","ts":1789183732130,"field":"cvss","old":null,"new":"5.2"},{"seq":109493,"id":"CVE-2026-80981","ts":1789183732130,"field":"severity","old":"none","new":"medium"}]}