CVE-2026-89463

Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: ucs1002: fix use-after-free on remove ucs1002 has no remove callback, so unbind runs entirely through devm. The alert IRQ handler queues the health_poll delayed work, and the work reschedules itself while the chip reports a bad-health condition. devm frees the alert IRQ, which only synchronizes the handler; it does not cancel the delayed work, which can then run after devm frees the driver data and dereference it. Register health_poll with devm_delayed_work_autocancel() before the alert IRQ is requested. devm then frees the IRQ before cancelling the work, so the handler can no longer queue it and the work is cancelled before the driver data is freed. This issue was found by an in-house static analysis tool.

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EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/00c19f8a9a58a318a76fd6f735a8aab3f8ead393 https://git.kernel.org/stable/c/2ec4d203ecb06d327af67e32097fe8f774838a40 https://git.kernel.org/stable/c/35242c93d35f391afdc84cef6236b8ad57f1df24 https://git.kernel.org/stable/c/39b60d615dfa1725c235351fb12bc72e5f8a8d32 https://git.kernel.org/stable/c/4ca2a4678202f15eb790eb7f1d562061709caea7 https://git.kernel.org/stable/c/609af0ceeaefdfa42cd01dd060b20f2e41f9a232 https://git.kernel.org/stable/c/a9a7bb801c443a4d9fc623c4a47deb53accb70bb

Frequently Asked Questions

What is CVE-2026-89463? +

In the Linux kernel, the following vulnerability has been resolved: power: supply: ucs1002: fix use-after-free on remove ucs1002 has no remove callback, so unbind runs entirely through devm. The alert IRQ handler queues the health_poll delayed work, and the work reschedules itself while the chip reports a bad-health condition. devm frees the alert IRQ, which only synchronizes the handler; it does not cancel the delayed work, which can then run after devm frees the driver data and dereference it. Register health_poll with devm_delayed_work_autocancel() before the alert IRQ is requested. devm then frees the IRQ before cancelling the work, so the handler can no longer queue it and the work is cancelled before the driver data is freed. This issue was found by an in-house static analysis tool.

How do I check if I'm vulnerable to CVE-2026-89463? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.