power: supply: pm8916_lbc: Fix use-after-free in power_supply_changed()

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Summary

CVECVE-2026-45938
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:09 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: 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()`. 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 f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 dbe579e620ef0f53db490ec79a8566e4ea8918ac git Not specified
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 08e674e9862a2db46fb234eb7c5442455ece0131 git Not specified
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 d7d31fc99d248d5f47588f50dce5c7599c991c6a git Not specified
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 b7508129978ae1e2ed9b0410396abc05def9c4eb git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 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/dbe579e620ef0f53db490ec79a8566e4ea8918ac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b7508129978ae1e2ed9b0410396abc05def9c4eb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/08e674e9862a2db46fb234eb7c5442455ece0131 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d7d31fc99d248d5f47588f50dce5c7599c991c6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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