{"id":"CVE-2026-89436","title":"kernel: platform/x86: panasonic-laptop: Fix sentinel write past pcc->sinf[] (CVE-2026-89436)","summary":"A flaw was found in the Linux kernel's `panasonic-laptop` driver. This vulnerability involves an out-of-bounds write when processing ACPI SINF packages, where a small amount of data is written beyond the intended memory buffer. This can le…","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-787","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T21:28:20+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89436.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89436.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89436"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532194"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89436"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89436"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89436.mbox"},{"url":"https://git.kernel.org/stable/c/329f10d8be193bf36af124e00b9dd6644cd71724"},{"url":"https://git.kernel.org/stable/c/a93df956ee4d903735b6d395362c839cb1dc07e3"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00133,"epssPercentile":0.03193,"scores":{"vendor":4.1,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-89436","body":"## Overview\n\nA flaw was found in the Linux kernel's `panasonic-laptop` driver. This vulnerability involves an out-of-bounds write when processing ACPI SINF packages, where a small amount of data is written beyond the intended memory buffer. This can lead to a heap overflow, which might cause system instability or a denial of service.\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-2026-89436.json)\n\n**kernel: platform/x86: panasonic-laptop: Fix sentinel write past pcc->sinf[]** — 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":204122,"id":"CVE-2026-89436","ts":1789490231793,"field":"cvss","old":"4.1","new":"5.5"},{"seq":202913,"id":"CVE-2026-89436","ts":1789403732919,"field":"cvss","old":"7.8","new":"4.1"},{"seq":202912,"id":"CVE-2026-89436","ts":1789403732919,"field":"severity","old":"high","new":"medium"},{"seq":198062,"id":"CVE-2026-89436","ts":1789384321617,"field":"cvss","old":"4.1","new":"7.8"},{"seq":198061,"id":"CVE-2026-89436","ts":1789384321617,"field":"severity","old":"medium","new":"high"},{"seq":183554,"id":"CVE-2026-89436","ts":1789356675863,"field":"cvss","old":"7.8","new":"4.1"},{"seq":183553,"id":"CVE-2026-89436","ts":1789356675863,"field":"severity","old":"high","new":"medium"},{"seq":153218,"id":"CVE-2026-89436","ts":1789285349594,"field":"cvss","old":null,"new":"7.8"},{"seq":153217,"id":"CVE-2026-89436","ts":1789285349594,"field":"severity","old":"none","new":"high"},{"seq":147622,"id":"CVE-2026-89436","ts":1789270211632,"field":"cvss","old":null,"new":"4.1"},{"seq":147621,"id":"CVE-2026-89436","ts":1789270211632,"field":"severity","old":"none","new":"medium"},{"seq":109376,"id":"CVE-2026-89436","ts":1789183731667,"field":"cvss","old":null,"new":"4.1"},{"seq":109375,"id":"CVE-2026-89436","ts":1789183731667,"field":"severity","old":"none","new":"medium"}]}