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

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Summary

CVECVE-2026-45936
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: goldfish: 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 84d7b768748943db2bb658b43931fdab04c224cc 589d4fe56713c6344cd9f8939f9c7621c85f0966 git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc bad8b61eb5059acd88349680e47839342dc89e94 git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc 33751e28842bf5aee5ef7b2b8d5e456a069095cb git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc 77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc 4350505e82b4f972ddb788e1c712c557c38859d0 git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc 8c89aade8335e26a6a7dcda18992d15f51943927 git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc 0b29ffe4090a3fc7a7649de20e1eb1e53adddac7 git Not specified
CNA Linux Linux affected 84d7b768748943db2bb658b43931fdab04c224cc b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b git Not specified
CNA Linux Linux affected 3.9 Not specified
CNA Linux Linux unaffected 3.9 semver Not specified
CNA Linux Linux unaffected 5.10.252 5.10.* 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/0b29ffe4090a3fc7a7649de20e1eb1e53adddac7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8c89aade8335e26a6a7dcda18992d15f51943927 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/589d4fe56713c6344cd9f8939f9c7621c85f0966 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bad8b61eb5059acd88349680e47839342dc89e94 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/33751e28842bf5aee5ef7b2b8d5e456a069095cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4350505e82b4f972ddb788e1c712c557c38859d0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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