power: supply: bq256xx: Fix use-after-free in power_supply_changed()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45902
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:04 UTC
Updated2026-06-24 16:29:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: bq256xx: 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 32e4978bb920d047fe5de3ea42d176f267c01f63 81d3688c9a2158329391e08f2d0b8ba204216044 git Not specified
CNA Linux Linux affected 32e4978bb920d047fe5de3ea42d176f267c01f63 74b5a88318db97d51bb40f774736553c2acd1514 git Not specified
CNA Linux Linux affected 32e4978bb920d047fe5de3ea42d176f267c01f63 cb5c743936edcebc51880eeb6bf04979b5c9438b git Not specified
CNA Linux Linux affected 32e4978bb920d047fe5de3ea42d176f267c01f63 83c27fdd696ac13d023ef7a0345301be93209c53 git Not specified
CNA Linux Linux affected 32e4978bb920d047fe5de3ea42d176f267c01f63 4b6fb0b6124f558131e502e3ffd03e6583b3ace6 git Not specified
CNA Linux Linux affected 32e4978bb920d047fe5de3ea42d176f267c01f63 8796910131a32ff29275052df768ef022929a394 git Not specified
CNA Linux Linux affected 32e4978bb920d047fe5de3ea42d176f267c01f63 8005843369723d9c8975b7c4202d1b85d6125302 git Not specified
CNA Linux Linux affected 5.12 Not specified
CNA Linux Linux unaffected 5.12 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/4b6fb0b6124f558131e502e3ffd03e6583b3ace6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8005843369723d9c8975b7c4202d1b85d6125302 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/81d3688c9a2158329391e08f2d0b8ba204216044 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8796910131a32ff29275052df768ef022929a394 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/74b5a88318db97d51bb40f774736553c2acd1514 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/83c27fdd696ac13d023ef7a0345301be93209c53 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cb5c743936edcebc51880eeb6bf04979b5c9438b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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