clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89769
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:20:08 UTC
Updated2026-09-11 20:20:08 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path When cpuhp_setup_state fails after pit_clockevent_per_cpu_init has successfully called request_irq, the error handling jumps directly to out_pit_clocksource_unregister without freeing the registered IRQ. This leaks the IRQ line and, since kfree(pit) follows, leaves a dangling pointer registered as the interrupt handler's dev_id, potentially leading to a use-after-free if the IRQ fires afterwards. Fix it by calling pit_clockevent_per_cpu_exit to properly release the IRQ before falling through to the existing cleanup chain.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bee33f22d7c30626e711b4900e3f460b6e0e104f d53c29a89a15e56a1797f3ef249955e544782e04 git Not specified
CNA Linux Linux affected bee33f22d7c30626e711b4900e3f460b6e0e104f cdcd861123248e871c2ec2be968b0a1b2a5a34b0 git Not specified
CNA Linux Linux affected bee33f22d7c30626e711b4900e3f460b6e0e104f 05520e035f8332c8e33f3011b5ca016fde61793d git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/cdcd861123248e871c2ec2be968b0a1b2a5a34b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d53c29a89a15e56a1797f3ef249955e544782e04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/05520e035f8332c8e33f3011b5ca016fde61793d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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