What’s Vulnerable › Vulnerabilities

CVE-2026-89475: power: supply: bq24257: fix use-after-free on remove

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq24257: fix use-after-free on remove The STAT-pin interrupt is devm-managed, so it stays armed until the devm cleanup that runs after remove() returns. remove() cancels bq->iilimit_setup_work while the threaded handler can still fire; that handler reschedules the work and dereferences bq, so the work runs against freed memory once devm frees bq. Make the delayed work device-managed with devm_delayed_work_autocancel(), registered before the interrupt request. The devm cleanup then releases the interrupt first, so the handler can no longer reschedule the work, and cancels the work before bq is freed. The explicit cancel_delayed_work_sync() in remove() is no longer needed and is dropped. Found by static analysis.

Affected products

• Linux: 4.2 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/47ccbad210f48721c30d69d65b83dc9fff919ca9
• https://git.kernel.org/stable/c/6d2eb93975c07b0169a3287efc1ae3b60cf52d8e
• https://git.kernel.org/stable/c/861ec73ce86e2ca18082cc7be4f140a5bbdf1428
• https://git.kernel.org/stable/c/9aace29bbcfa64450c53773ed2f20e95987b3690
• https://git.kernel.org/stable/c/9d34c9d660c3d0931d2cc749c46c47cf31f96e48
• https://git.kernel.org/stable/c/9d77fd7dd9a3ad57f7655c5264b503b85adbb7b8
• https://git.kernel.org/stable/c/a279e64c907f5638bb34cb8e2c9285798cf5f690
• https://git.kernel.org/stable/c/f495808cdd6d9576965787cf6d9737d0b0e86b73

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