CVE-2026-89893

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-16

AI risk analysis

Summary: The vulnerability allows a race condition where the netup_ci_state can be freed while its work item is still running, potentially leading to a kernel crash or data corruption.
Exploitability: Exploitation requires the attacker to trigger the work item after the state has been freed, which is moderately difficult given the race condition.
Blast radius: If exploited, the vulnerability could lead to a denial of service or kernel panic, impacting the stability of the system.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the fixed version 5.10.100 or later.

race-conditionkernelstability

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

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

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.