{"id":"CVE-2026-89556","title":"kernel: module: validate string table section types (CVE-2026-89556)","summary":"A flaw was found in the Linux kernel. This vulnerability arises from insufficient validation of string table section types within ELF (Executable and Linkable Format) files. A local attacker could exploit this by providing a specially craf…","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 >= c92aab819d56d51631f0484ed7af11d9d8ff4cb0 < 50d0aa7d25ba4bc3606f150cd69755068e79f97f","Linux >= c92aab819d56d51631f0484ed7af11d9d8ff4cb0 < e4496dda2c6d0acf7ba5fbce14a2723a8935ceee","Linux >= c92aab819d56d51631f0484ed7af11d9d8ff4cb0 < 9a5ff45689329835f874cefe5174e577d141d423","Linux 6.13"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T12:24:14+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89556.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89556.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89556"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532494"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89556"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89556"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89556.mbox"},{"url":"https://git.kernel.org/stable/c/50d0aa7d25ba4bc3606f150cd69755068e79f97f"},{"url":"https://git.kernel.org/stable/c/e4496dda2c6d0acf7ba5fbce14a2723a8935ceee"},{"url":"https://git.kernel.org/stable/c/9a5ff45689329835f874cefe5174e577d141d423"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00198,"epssPercentile":0.09829,"ingestedAt":"2026-09-14T15:23:07.476Z","slug":"CVE-2026-89556","body":"## Overview\n\nA flaw was found in the Linux kernel. This vulnerability arises from insufficient validation of string table section types within ELF (Executable and Linkable Format) files. A local attacker could exploit this by providing a specially crafted ELF module, leading to the kernel attempting to access memory outside of its allocated boundaries. This out-of-bounds memory access could result in system instability, causing a denial of service, or potentially lead to the disclosure of sensitive information.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89556.json)\n\n**kernel: module: validate string table section types** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\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":203891,"id":"CVE-2026-89556","ts":1789490212541,"field":"cvss","old":null,"new":"5.5"},{"seq":203890,"id":"CVE-2026-89556","ts":1789490212541,"field":"severity","old":"none","new":"medium"},{"seq":147125,"id":"CVE-2026-89556","ts":1789270195403,"field":"cvss","old":null,"new":"4.7"},{"seq":147124,"id":"CVE-2026-89556","ts":1789270195403,"field":"severity","old":"none","new":"medium"},{"seq":108868,"id":"CVE-2026-89556","ts":1789183729327,"field":"cvss","old":null,"new":"4.7"},{"seq":108867,"id":"CVE-2026-89556","ts":1789183729327,"field":"severity","old":"none","new":"medium"}]}