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CVE-2026-89463

UnknownEPSS 0.20%

Last modified

CVE-2026-89463 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.20%

9.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < 00c19f8a9a58a318a76fd6f735a8aab3f8ead393; >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < a9a7bb801c443a4d9fc623c4a47deb53accb70bb; >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < 2ec4d203ecb06d327af67e32097fe8f774838a40; >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < 4ca2a4678202f15eb790eb7f1d562061709caea7; >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < 39b60d615dfa1725c235351fb12bc72e5f8a8d32; >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < 35242c93d35f391afdc84cef6236b8ad57f1df24; >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d, < 609af0ceeaefdfa42cd01dd060b20f2e41f9a232
LinuxLinux5.10

References

Timeline

Published
Last Modified
Status
Received

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 severe is CVE-2026-89463?
Severity scoring for CVE-2026-89463 is pending analysis. The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89463?
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.

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Source: NVD / NIST