CVE-2026-89474

Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq256xx: drain usb_work before freeing the charger The USB-PHY notifier queues usb_work, whose handler calls power_supply_changed(bq->charger). The reset devm action only unregisters the notifier and was registered before the power supplies, so devm frees bq->charger on unwind before the action runs; a usb_work still queued can then dereference it. Register the reset action after the power supplies, so it unregisters the notifiers and drains usb_work before the supplies are released. Initialize usb_work and obtain the PHY references before registering the notifiers, so the worker cannot run before the supplies exist. Found by static analysis.

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EPSS — Exploit Prediction

0.0017

Probability of exploitation

0.07%

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/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8 https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2 https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343 https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7 https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c

Frequently Asked Questions

What is CVE-2026-89474? +

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq256xx: drain usb_work before freeing the charger The USB-PHY notifier queues usb_work, whose handler calls power_supply_changed(bq->charger). The reset devm action only unregisters the notifier and was registered before the power supplies, so devm frees bq->charger on unwind before the action runs; a usb_work still queued can then dereference it. Register the reset action after the power supplies, so it unregisters the notifiers and drains usb_work before the supplies are released. Initialize usb_work and obtain the PHY references before registering the notifiers, so the worker cannot run before the supplies exist. Found by static analysis.

How do I check if I'm vulnerable to CVE-2026-89474? +

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.