power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler

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Summary

CVECVE-2026-46246
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-03 18:16:24 UTC
Updated2026-06-03 18:16:24 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `extcon` handle, means that the `extcon` 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 `extcon` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `extcon_set_state_sync()` with a freed `extcon` handle. Which usually crashes the system or otherwise silently corrupts the memory... Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `extcon` handle.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 9fab0120907e6965168e55b1e17cb9dfaf262b86 git Not specified
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 47abfc207ab02cf1297257e282e8048da63f0d08 git Not specified
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 48e0f68b50c344bb2d78d65dd98f93e41276ee00 git Not specified
CNA Linux Linux affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 23067259919663580c6f81801847cfc7bd54fd1f 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/23067259919663580c6f81801847cfc7bd54fd1f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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