CVE-2026-89893media: cx23885: cancel NetUP CI work before teardown
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: media: cx23885: cancel NetUP CI work before teardown netup_ci_exit() frees a netup_ci_state while its work item, netup_read_ci_status(), may still be pending or running on the system workqueue. The worker obtains the state with container_of() and dereferences it, so it must not outlive the state. netup_ci_init() queues the initial status read, and CI GPIO interrupts subsequently queue the same work from netup_ci_slot_status(). During remove, cx23885_finidev() calls free_irq() before the CI device is unregistered. free_irq() prevents further IRQ handlers from running, but does not drain work queued previously, so the worker can run after netup_ci_exit() frees the state. Call cancel_work_sync() before dvb_ca_en50221_release() and kfree(). This issue was found by an in-house static analysis tool.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before aaf76794b870b0f391eff339252a2e2e22f33a4a; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before f7ff5adb63c1b277565afa54ccc0924d841b4a52; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before 140ecbcbf978fbe60f83f8d4f8b1199029a5c763; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before ec82b0cf7f75fd95802592dcc9560fc7f529bba4; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before 5deec890ecfa04d21cfa9bb9a2fe5e9dc98db5c5; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before bf3f49273d5bf6acbdad18ff44c01ffcf7a7a146; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before 99cd62b9b1c818d6d01a87be9a8e5796314150a2; from c184dcd282337c09695a4c1761d7ac77fdc8fb7d before 4e143d662ca94888b494b2427fc9e34494eb933a | CNA record |
References
- https://git.kernel.org/stable/c/aaf76794b870b0f391eff339252a2e2e22f33a4a
- https://git.kernel.org/stable/c/f7ff5adb63c1b277565afa54ccc0924d841b4a52
- https://git.kernel.org/stable/c/140ecbcbf978fbe60f83f8d4f8b1199029a5c763
- https://git.kernel.org/stable/c/ec82b0cf7f75fd95802592dcc9560fc7f529bba4
- https://git.kernel.org/stable/c/5deec890ecfa04d21cfa9bb9a2fe5e9dc98db5c5
- https://git.kernel.org/stable/c/bf3f49273d5bf6acbdad18ff44c01ffcf7a7a146
- https://git.kernel.org/stable/c/99cd62b9b1c818d6d01a87be9a8e5796314150a2
- https://git.kernel.org/stable/c/4e143d662ca94888b494b2427fc9e34494eb933a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.