Strix
63.7K

CVE-2026-89893

HIGHCVSS 7.8/10

Last modified

CVE-2026-89893 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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().

Description

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < aaf76794b870b0f391eff339252a2e2e22f33a4a; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < f7ff5adb63c1b277565afa54ccc0924d841b4a52; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < 140ecbcbf978fbe60f83f8d4f8b1199029a5c763; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < ec82b0cf7f75fd95802592dcc9560fc7f529bba4; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < 5deec890ecfa04d21cfa9bb9a2fe5e9dc98db5c5; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < bf3f49273d5bf6acbdad18ff44c01ffcf7a7a146; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < 99cd62b9b1c818d6d01a87be9a8e5796314150a2; >= c184dcd282337c09695a4c1761d7ac77fdc8fb7d, < 4e143d662ca94888b494b2427fc9e34494eb933a
LinuxLinux2.6.30

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89893?
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.
How severe is CVE-2026-89893?
CVE-2026-89893 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-89893?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-89893?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST