{"id":"CVE-2026-89892","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: defer audio-only extension registration\n\nThe audio-only path registers extensions while probing the primary device.\nFor a dual-TS board, this happens bef…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: defer audio-only extension registration\n\nThe audio-only path registers extensions while probing the primary device.\nFor a dual-TS board, this happens bef…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 4a089668ef22c295ed4997289cc48446c849249c < 0da1e627f4fc9d0e947fdae90913042120878923","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < f8d7e77d9c621b42a191c67a9b37bec23dc1d555","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < 1abe9524dec0fd26e9ceb8d586034d6f68dd8273","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < 4e11c45dfdc72ab656067b1df8fcebaf52fd4715","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < d06067ee32620f272cfb80c7bc7c572ad4e74724","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < f9322ac9f862961d7f377b87ec26c8565af7e073","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < 4666197ca4f7d80cd3b0292054fe45d76be9ba04","Linux >= 4a089668ef22c295ed4997289cc48446c849249c < 95f76f51937fdfb0fc1e14cae606b1ef574a56f3","Linux 4.17"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:16:57.870","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89892","references":[{"url":"https://git.kernel.org/stable/c/0da1e627f4fc9d0e947fdae90913042120878923","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1abe9524dec0fd26e9ceb8d586034d6f68dd8273","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4666197ca4f7d80cd3b0292054fe45d76be9ba04","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4e11c45dfdc72ab656067b1df8fcebaf52fd4715","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/95f76f51937fdfb0fc1e14cae606b1ef574a56f3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d06067ee32620f272cfb80c7bc7c572ad4e74724","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8d7e77d9c621b42a191c67a9b37bec23dc1d555","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f9322ac9f862961d7f377b87ec26c8565af7e073","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89892.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89892"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535230"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89892"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89892"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89892.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-89892"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-16T10:53:53.982Z","epss":0.00216,"epssPercentile":0.11993,"cvss":5.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-416"],"slug":"CVE-2026-89892","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: defer audio-only extension registration\n\nThe audio-only path registers extensions while probing the primary device.\nFor a dual-TS board, this happens before dev_next is created. The duplicate\ndevice inherits is_audio_only and is then independently inserted into\nem28xx_devlist.\n\nThe list is intended to contain only primary devices: extension operations\nreach the secondary device through dev_next. The independently linked\nsecondary can be freed during disconnect while its list node remains\nreachable, resulting in a use-after-free.\n\nDefer audio-only extension registration to the module-request work item. It\nruns only after probing has completed construction of the optional\nsecondary device, so only the primary is registered and extension callbacks\nreach the secondary through dev_next.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89892.json)","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":28.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228552,"id":"CVE-2026-89892","ts":1792844783828,"field":"cvss","old":null,"new":"5.1"},{"seq":228551,"id":"CVE-2026-89892","ts":1792844783828,"field":"severity","old":"none","new":"medium"}]}