power: supply: ab8500_fg: fix use-after-free on remove

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89797
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:16:44 UTC
Updated2026-09-16 11:16:44 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500_fg: fix use-after-free on remove ab8500_fg_remove() destroys the driver workqueue while the threaded interrupt handlers are still armed; they are devm-managed and freed only after ->remove() returns, so a handler that fires in that window queues work on the freed workqueue. Tear the workqueue down through devm instead, registering its cleanup after the power supply and before the interrupt requests. devm then frees the interrupts first, so the handlers can no longer queue work, before disabling the delayed and plain work items and destroying the workqueue. Disabling the items, rather than cancelling them, keeps them disabled so no producer (including the power-supply external_power_changed callback) can requeue them. Found by an in-house static analysis tool.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 13151631b5bd06a1511353bb221079bbd76606c3 c660c017dec1fd7cd88e1103c5ae1aae6ce636bf git Not specified
CNA Linux Linux affected 13151631b5bd06a1511353bb221079bbd76606c3 013731074ab6a8d11ec209eee64c5b2656954479 git Not specified
CNA Linux Linux affected 13151631b5bd06a1511353bb221079bbd76606c3 75b1e88d34254f4fb7753345e21bfee47abddd7f git Not specified
CNA Linux Linux affected 3.4 Not specified
CNA Linux Linux unaffected 3.4 semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/013731074ab6a8d11ec209eee64c5b2656954479 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c660c017dec1fd7cd88e1103c5ae1aae6ce636bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/75b1e88d34254f4fb7753345e21bfee47abddd7f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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