{"id":"CVE-2026-89741","title":"kernel: Revert \"media: v4l2-dev: fix error handling in __video_register_device()\" (CVE-2026-89741)","summary":"A flaw was found in the Linux kernel's media subsystem, specifically within the v4l2-dev component. This vulnerability arises from incorrect error handling in the `__video_register_device()` function. If a device registration fails, the sy…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-664","CWE-1341"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9"],"published":"2026-09-11","updated":"2026-10-21","sourceUpdated":"2026-10-21T08:32:33+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89741.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89741.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89741"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532384"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89741"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89741"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89741.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-89741"},{"url":"https://git.kernel.org/stable/c/8b998c171ed875e402e1fd1c5cd619e4ca05e9c1"},{"url":"https://git.kernel.org/stable/c/3de14b4f681a1b3c6d375d98d9d37a55ebb85349"},{"url":"https://git.kernel.org/stable/c/8027f82c0f5474ed72448e160ee9778051fa1f49"},{"url":"https://git.kernel.org/stable/c/2ac009a65d2385e9f0799eaf9d9694a29153a161"},{"url":"https://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e"},{"url":"https://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce"},{"url":"https://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c"},{"url":"https://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00169,"epssPercentile":0.06198,"scores":{"vendor":7,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.449Z","slug":"CVE-2026-89741","body":"## Overview\n\nA flaw was found in the Linux kernel's media subsystem, specifically within the v4l2-dev component. This vulnerability arises from incorrect error handling in the `__video_register_device()` function. If a device registration fails, the system attempts to free the same memory region twice, leading to a double-free condition. This type of flaw can result in system instability, memory corruption, or a denial of service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89741.json)\n\n**kernel: Revert \"media: v4l2-dev: fix error handling in __video_register_device()\"** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-10-21.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\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\nFix deferred\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227026,"id":"CVE-2026-89741","ts":1792585019572,"field":"cvss","old":"7.8","new":"4.7"},{"seq":227025,"id":"CVE-2026-89741","ts":1792585019572,"field":"severity","old":"high","new":"medium"},{"seq":224587,"id":"CVE-2026-89741","ts":1792401421940,"field":"cvss","old":"7","new":"7.8"},{"seq":205434,"id":"CVE-2026-89741","ts":1789576713599,"field":"cvss","old":"7.8","new":"7"},{"seq":197684,"id":"CVE-2026-89741","ts":1789384318394,"field":"cvss","old":"5.8","new":"7.8"},{"seq":197683,"id":"CVE-2026-89741","ts":1789384318394,"field":"severity","old":"medium","new":"high"},{"seq":183839,"id":"CVE-2026-89741","ts":1789356677622,"field":"cvss","old":"7.8","new":"5.8"},{"seq":183838,"id":"CVE-2026-89741","ts":1789356677622,"field":"severity","old":"high","new":"medium"},{"seq":153624,"id":"CVE-2026-89741","ts":1789285351602,"field":"cvss","old":null,"new":"7.8"},{"seq":153623,"id":"CVE-2026-89741","ts":1789285351602,"field":"severity","old":"none","new":"high"},{"seq":147291,"id":"CVE-2026-89741","ts":1789270207474,"field":"cvss","old":null,"new":"5.8"},{"seq":147290,"id":"CVE-2026-89741","ts":1789270207474,"field":"severity","old":"none","new":"medium"},{"seq":109048,"id":"CVE-2026-89741","ts":1789183730103,"field":"cvss","old":null,"new":"5.8"},{"seq":109047,"id":"CVE-2026-89741","ts":1789183730103,"field":"severity","old":"none","new":"medium"}]}