serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ

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Summary

CVECVE-2026-74652
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:38 UTC
Updated2026-08-22 16:16:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ The RS485 trigger hrtimers are embedded in the devm-managed port and can fire after it is freed. The IRQ handler can arm a timer, so free the IRQ first and then cancel both timers. Complete the RS485 stop without arming a timer, and cancel the timers in remove() for the suspend-then-unbind path, where shutdown is not called. This issue was found by an in-house static analysis tool.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2c1fd53af21b8cb13878b054894d33d3383eb1f3 759ead98a39fb625be302f9aa66290985dcaa325 git Not specified
CNA Linux Linux affected 2c1fd53af21b8cb13878b054894d33d3383eb1f3 e57f0aa5c35be37218ba0e4887b241584dd4b2d2 git Not specified
CNA Linux Linux affected 2c1fd53af21b8cb13878b054894d33d3383eb1f3 36672c8d7d14e9c43287528455d2c97b526ea6ad git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/36672c8d7d14e9c43287528455d2c97b526ea6ad 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e57f0aa5c35be37218ba0e4887b241584dd4b2d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/759ead98a39fb625be302f9aa66290985dcaa325 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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