power: supply: ab8500: Fix use-after-free in power_supply_changed()

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Summary

CVECVE-2026-45946
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:10 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Commit 1c1f13a006ed ("power: supply: ab8500: Move to componentized binding") introduced this issue during a refactorization. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb 43cbb78ee047b9b12d096d40e3be265969d4c1f8 git Not specified
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb 551672981fe227122258a25a385a05f5c0746ad6 git Not specified
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb f50433f2603def08b21a4bf2fd238687fb5cbde9 git Not specified
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb 847eeb6c0efcd76c7def73857cf798a4fcd8f79b git Not specified
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb 709db4b476e254579d9c48ec34d397a41ca0c407 git Not specified
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb 46dbda27b028d78087667e8280966b99cec015ca git Not specified
CNA Linux Linux affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb c4af8a98bb52825a5331ae1d0604c0ea6956ba4b git Not specified
CNA Linux Linux affected 341db343768bc44f3512facc464021730d64071c git Not specified
CNA Linux Linux affected 5.13.4 5.14 semver Not specified
CNA Linux Linux affected 5.14 Not specified
CNA Linux Linux unaffected 5.14 semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.14 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.4 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c4af8a98bb52825a5331ae1d0604c0ea6956ba4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f50433f2603def08b21a4bf2fd238687fb5cbde9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/46dbda27b028d78087667e8280966b99cec015ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/847eeb6c0efcd76c7def73857cf798a4fcd8f79b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/43cbb78ee047b9b12d096d40e3be265969d4c1f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/709db4b476e254579d9c48ec34d397a41ca0c407 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/551672981fe227122258a25a385a05f5c0746ad6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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