{"id":"CVE-2026-98517","title":"kernel: drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM (CVE-2026-98517)","summary":"A flaw was found in the Linux kernel's Nouveau graphics driver. When handling buffer objects in system memory, the driver improperly accesses memory past the allocated resource boundary. A local attacker could exploit this flaw to cause a …","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":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:23:31+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98517.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98517.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98517"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554879"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98517"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98517"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98517.mbox"},{"url":"https://git.kernel.org/stable/c/34d9dffaf0ff43ac395a7955b3f7b5d9d6154bf3"},{"url":"https://git.kernel.org/stable/c/1245b4b43da67596be61600dbd746539c79495ac"},{"url":"https://git.kernel.org/stable/c/0d29bf51f8dddcf8556bf76710d3dd3024a1a717"},{"url":"https://git.kernel.org/stable/c/5b2fffbba290ed74f381911b9986570bc10feaa4"},{"url":"https://git.kernel.org/stable/c/3359a372efb6d585c97019ee1b7f1874442bcebe"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00164,"epssPercentile":0.05538,"scores":{"vendor":5.5,"cna":7.8},"ingestedAt":"2026-10-18T15:45:12.284Z","slug":"CVE-2026-98517","body":"## Overview\n\nA flaw was found in the Linux kernel's Nouveau graphics driver. When handling buffer objects in system memory, the driver improperly accesses memory past the allocated resource boundary. A local attacker could exploit this flaw to cause a Denial of Service (DoS) through a kernel crash or potentially access sensitive kernel information.\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 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98517.json)\n\n**kernel: drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.\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 Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229523,"id":"CVE-2026-98517","ts":1793019833688,"field":"cvss","old":"7.8","new":"5.5"},{"seq":229522,"id":"CVE-2026-98517","ts":1793019833688,"field":"severity","old":"high","new":"medium"},{"seq":228934,"id":"CVE-2026-98517","ts":1792854114574,"field":"cvss","old":null,"new":"7.8"},{"seq":228933,"id":"CVE-2026-98517","ts":1792854114574,"field":"severity","old":"none","new":"high"}]}