power: supply: rt9455: Fix use-after-free in power_supply_changed()

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Summary

CVECVE-2026-46270
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-03 18:16:28 UTC
Updated2026-06-03 18:16:28 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: 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 e86d69dd786e94046b8f5be7df1b9a8226a40b2a d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a 62d753b916bd500bb269b7078cdab73198ab4718 git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a a39f8f06216f73ef40e71e2fe4ad071964c1fd36 git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a af261f218a7606f93d2c786353d60bb4feb56ef0 git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a 2178dc65d45e2f7bcaa8af8d80d100419bdab251 git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a 64e15155095f39f4dec9b4659da1238ef8fc54d4 git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a 721449a15170fc5f028a7576d7f65b9f60d53482 git Not specified
CNA Linux Linux affected e86d69dd786e94046b8f5be7df1b9a8226a40b2a e2febe375e5ea5afed92f4cd9711bde8f24ee6d2 git Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 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/721449a15170fc5f028a7576d7f65b9f60d53482 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2178dc65d45e2f7bcaa8af8d80d100419bdab251 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/af261f218a7606f93d2c786353d60bb4feb56ef0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a39f8f06216f73ef40e71e2fe4ad071964c1fd36 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/62d753b916bd500bb269b7078cdab73198ab4718 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/64e15155095f39f4dec9b4659da1238ef8fc54d4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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