{"id":"CVE-2026-80986","title":"kernel: net/smc: bound the peer rkey counts in SMC-Rv2 LLC messages (CVE-2026-80986)","summary":"A flaw was found in the Linux kernel's SMC-Rv2 network component. A remote attacker could exploit this vulnerability by sending a specially crafted message during an SMC-Rv2 link addition. This can lead to a slab-out-of-bounds write, poten…","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-787","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":"2026-09-14T19:49:18+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80986.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80986.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80986"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532205"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80986"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80986"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80986.mbox"},{"url":"https://git.kernel.org/stable/c/2d1e7c5aaa3326e95e2058457f172ca99a9a4577"},{"url":"https://git.kernel.org/stable/c/486c699a8cde82c1d9b4f443eeab4ddf86358cb0"},{"url":"https://git.kernel.org/stable/c/5e5d9e6df677d30a2203d257b5fd8b99814fa607"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00605,"epssPercentile":0.47356,"scores":{"vendor":4.1,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.476Z","slug":"CVE-2026-80986","body":"## Overview\n\nA flaw was found in the Linux kernel's SMC-Rv2 network component. A remote attacker could exploit this vulnerability by sending a specially crafted message during an SMC-Rv2 link addition. This can lead to a slab-out-of-bounds write, potentially causing a system crash and resulting in a denial of service.\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-2026-80986.json)\n\n**kernel: net/smc: bound the peer rkey counts in SMC-Rv2 LLC messages** — 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":204160,"id":"CVE-2026-80986","ts":1789490234809,"field":"cvss","old":"4.1","new":"7"},{"seq":204159,"id":"CVE-2026-80986","ts":1789490234809,"field":"severity","old":"medium","new":"high"},{"seq":202927,"id":"CVE-2026-80986","ts":1789403732983,"field":"cvss","old":"9.8","new":"4.1"},{"seq":202926,"id":"CVE-2026-80986","ts":1789403732983,"field":"severity","old":"critical","new":"medium"},{"seq":183588,"id":"CVE-2026-80986","ts":1789356676001,"field":"cvss","old":"9.8","new":"4.1"},{"seq":183587,"id":"CVE-2026-80986","ts":1789356676001,"field":"severity","old":"critical","new":"medium"},{"seq":153172,"id":"CVE-2026-80986","ts":1789285349398,"field":"cvss","old":null,"new":"9.8"},{"seq":153171,"id":"CVE-2026-80986","ts":1789285349398,"field":"severity","old":"none","new":"critical"},{"seq":147568,"id":"CVE-2026-80986","ts":1789270211419,"field":"cvss","old":null,"new":"4.1"},{"seq":147567,"id":"CVE-2026-80986","ts":1789270211419,"field":"severity","old":"none","new":"medium"},{"seq":109318,"id":"CVE-2026-80986","ts":1789183731406,"field":"cvss","old":null,"new":"4.1"},{"seq":109317,"id":"CVE-2026-80986","ts":1789183731406,"field":"severity","old":"none","new":"medium"}]}