{"id":"CVE-2026-89597","title":"kernel: fbdev: uvesafb: unregister connector callback on init failure (CVE-2026-89597)","summary":"A flaw was found in the `uvesafb` component of the Linux kernel. During the initialization process, if the platform driver fails to register, a connector callback is not properly unregistered. This oversight can lead to a resource leak, wh…","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-772","vendor":"Red Hat","product":"Linux","affected":["Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < b149f77d04082a9da75944cdc488becb0e35258f","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < 0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < 17518e7123f7ef01b1155064dc01f2087583908e","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < 9eb7b3cbe99c9c0edbff69eb155c723e30983c22","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < 9f8a822b44c42502f105cf6574f4867067eecdd0","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < 466a8af0dee2cf745307155e26884e19a37b7e15","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < 9e768ae51426af2034d479133cfd73010d641b1a","Linux >= 8bdb3a2d7df48b861972c4bfb58490853a228f51 < de8db23aa7c337e606fca9faf48b3ba72968597a","Linux 2.6.24"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T22:12:34+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89597.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89597.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89597"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532247"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89597"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89597"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89597.mbox"},{"url":"https://git.kernel.org/stable/c/b149f77d04082a9da75944cdc488becb0e35258f"},{"url":"https://git.kernel.org/stable/c/0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7"},{"url":"https://git.kernel.org/stable/c/17518e7123f7ef01b1155064dc01f2087583908e"},{"url":"https://git.kernel.org/stable/c/9eb7b3cbe99c9c0edbff69eb155c723e30983c22"},{"url":"https://git.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0"},{"url":"https://git.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15"},{"url":"https://git.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1a"},{"url":"https://git.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00164,"epssPercentile":0.06025,"scores":{"vendor":5.5,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.451Z","slug":"CVE-2026-89597","body":"## Overview\n\nA flaw was found in the `uvesafb` component of the Linux kernel. During the initialization process, if the platform driver fails to register, a connector callback is not properly unregistered. This oversight can lead to a resource leak, which may result in system instability or a denial of service (DoS) condition.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89597.json)\n\n**kernel: fbdev: uvesafb: unregister connector callback on init failure** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\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":208093,"id":"CVE-2026-89597","ts":1789922707736,"field":"cvss","old":"7.8","new":"5.5"},{"seq":208092,"id":"CVE-2026-89597","ts":1789922707736,"field":"severity","old":"high","new":"medium"},{"seq":197882,"id":"CVE-2026-89597","ts":1789384320798,"field":"cvss","old":"2.3","new":"7.8"},{"seq":197881,"id":"CVE-2026-89597","ts":1789384320798,"field":"severity","old":"low","new":"high"},{"seq":183333,"id":"CVE-2026-89597","ts":1789356674906,"field":"cvss","old":"7.8","new":"2.3"},{"seq":183332,"id":"CVE-2026-89597","ts":1789356674906,"field":"severity","old":"high","new":"low"},{"seq":153416,"id":"CVE-2026-89597","ts":1789285350425,"field":"cvss","old":null,"new":"7.8"},{"seq":153415,"id":"CVE-2026-89597","ts":1789285350425,"field":"severity","old":"none","new":"high"},{"seq":147456,"id":"CVE-2026-89597","ts":1789270210979,"field":"cvss","old":null,"new":"2.3"},{"seq":147455,"id":"CVE-2026-89597","ts":1789270210979,"field":"severity","old":"none","new":"low"},{"seq":109190,"id":"CVE-2026-89597","ts":1789183730663,"field":"cvss","old":null,"new":"2.3"},{"seq":109189,"id":"CVE-2026-89597","ts":1789183730663,"field":"severity","old":"none","new":"low"}]}