{"id":"CVE-2026-89893","summary":"media: cx23885: cancel NetUP CI work before teardown","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cx23885: cancel NetUP CI work before teardown\n\nnetup_ci_exit() frees a netup_ci_state while its work item,\nnetup_read_ci_status(), may still be pending or running on the system\nworkqueue. The worker obtains the state with container_of() and\ndereferences it, so it must not outlive the state.\n\nnetup_ci_init() queues the initial status read, and CI GPIO interrupts\nsubsequently queue the same work from netup_ci_slot_status(). During\nremove, cx23885_finidev() calls free_irq() before the CI device is\nunregistered. free_irq() prevents further IRQ handlers from running,\nbut does not drain work queued previously, so the worker can run after\nnetup_ci_exit() frees the state.\n\nCall cancel_work_sync() before dvb_ca_en50221_release() and kfree().\n\nThis issue was found by an in-house static analysis tool.","modified":"2026-09-18T03:48:33.764295802Z","published":"2026-09-16T10:31:55.374Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89893.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/140ecbcbf978fbe60f83f8d4f8b1199029a5c763"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4e143d662ca94888b494b2427fc9e34494eb933a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5deec890ecfa04d21cfa9bb9a2fe5e9dc98db5c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/99cd62b9b1c818d6d01a87be9a8e5796314150a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aaf76794b870b0f391eff339252a2e2e22f33a4a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf3f49273d5bf6acbdad18ff44c01ffcf7a7a146"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec82b0cf7f75fd95802592dcc9560fc7f529bba4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f7ff5adb63c1b277565afa54ccc0924d841b4a52"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89893.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89893"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c184dcd282337c09695a4c1761d7ac77fdc8fb7d"},{"fixed":"aaf76794b870b0f391eff339252a2e2e22f33a4a"},{"fixed":"f7ff5adb63c1b277565afa54ccc0924d841b4a52"},{"fixed":"140ecbcbf978fbe60f83f8d4f8b1199029a5c763"},{"fixed":"ec82b0cf7f75fd95802592dcc9560fc7f529bba4"},{"fixed":"5deec890ecfa04d21cfa9bb9a2fe5e9dc98db5c5"},{"fixed":"bf3f49273d5bf6acbdad18ff44c01ffcf7a7a146"},{"fixed":"99cd62b9b1c818d6d01a87be9a8e5796314150a2"},{"fixed":"4e143d662ca94888b494b2427fc9e34494eb933a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89893.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.30"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89893.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}