{"id":"CVE-2026-80951","title":"kernel: i3c: master: svc: bound IBI payload to the requested max_payload_len (CVE-2026-80951)","summary":"A flaw was found in the Linux kernel's I3C master driver. A malicious I3C device could exploit this by sending an In-Band Interrupt (IBI) payload that exceeds the allocated slot size. This can lead to an out-of-bounds write into the IBI po…","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":"2026-09-14T17:14:14+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80951.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80951.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80951"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532522"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80951"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80951"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80951.mbox"},{"url":"https://git.kernel.org/stable/c/7c099b0b292a68d0ef558527945dbfb756fbf893"},{"url":"https://git.kernel.org/stable/c/7cc5ba756bc1cfffab9cb2695742f9f479dc73f7"},{"url":"https://git.kernel.org/stable/c/35aa6730b8c5626b879a4e893fe664f59bf07d7f"},{"url":"https://git.kernel.org/stable/c/f296a0d5907bf88314dfda67245f7f69d1552470"},{"url":"https://git.kernel.org/stable/c/5697d779577e2786ff3348ae9b77020ac0cf0aab"},{"url":"https://git.kernel.org/stable/c/aac3c5aababc7fb69d5bf5b0cc52d308574e3a8c"},{"url":"https://git.kernel.org/stable/c/e2bda39d7f9f285ec803e200b5c1f17143d0b483"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00205,"epssPercentile":0.10897,"ingestedAt":"2026-09-14T15:23:07.455Z","slug":"CVE-2026-80951","body":"## Overview\n\nA flaw was found in the Linux kernel's I3C master driver. A malicious I3C device could exploit this by sending an In-Band Interrupt (IBI) payload that exceeds the allocated slot size. This can lead to an out-of-bounds write into the IBI pool, potentially causing memory corruption and system instability.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · 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-2026-80951.json)\n\n**kernel: i3c: master: svc: bound IBI payload to the requested max_payload_len** — rated Important 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,"exploitation":0,"ransomware":0},"changes":[{"seq":204242,"id":"CVE-2026-80951","ts":1789490240556,"field":"cvss","old":null,"new":"7"},{"seq":204241,"id":"CVE-2026-80951","ts":1789490240556,"field":"severity","old":"none","new":"high"},{"seq":147081,"id":"CVE-2026-80951","ts":1789270195088,"field":"cvss","old":null,"new":"6.1"},{"seq":147080,"id":"CVE-2026-80951","ts":1789270195088,"field":"severity","old":"none","new":"medium"}]}