power: supply: act8945a: Fix use-after-free in power_supply_changed()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45867
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:00 UTC
Updated2026-06-25 21:06:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: act8945a: 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000240000 probability, percentile 0.073320000 (date 2026-06-01)

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 f2a0777b1e5a3cee1712c4d3e9095c0df8fc8cb3 git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 0768e8525a46df103647ca5059b32320d7fd17e4 git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 d023ef9f748b2090f7a9dbdd5c622b6ad99088ea git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 697bb5dc0cb4791e244f3970b067bc1ef33be9d9 git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 76a42ba547a9b2e2337894f67a4d9247445007d5 git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 f27eb76def5c07e4d7cc468b40741f19dafc83ce git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 83c1bd466c514cb24ca6ef347c5aac76a13c4e1e git Not specified
CNA Linux Linux affected a09209acd6a808794bdd7866af3678d1fd1d90e7 3291c51d4684d048dd2eb91b5b65fcfdaf72141f git Not specified
CNA Linux Linux affected 4.9 Not specified
CNA Linux Linux unaffected 4.9 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/697bb5dc0cb4791e244f3970b067bc1ef33be9d9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d023ef9f748b2090f7a9dbdd5c622b6ad99088ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3291c51d4684d048dd2eb91b5b65fcfdaf72141f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/83c1bd466c514cb24ca6ef347c5aac76a13c4e1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f27eb76def5c07e4d7cc468b40741f19dafc83ce 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/76a42ba547a9b2e2337894f67a4d9247445007d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0768e8525a46df103647ca5059b32320d7fd17e4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f2a0777b1e5a3cee1712c4d3e9095c0df8fc8cb3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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