ptp: ocp: fix resource freeing order

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Summary

CVECVE-2026-53222
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:39 UTC
Updated2026-06-25 09:16:39 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ptp: ocp: fix resource freeing order Commit a60fc3294a37 ("ptp: rework ptp_clock_unregister() to disable events") added a call to ptp_disable_all_events() which changes the configuration of pins if they support EXTTS events. In ptp_ocp_detach() pins resources are freed before ptp_clock_unregister() and it leads to use-after-free during driver removal. Fix it by changing the order of free/unregister calls. To avoid irq handler running on the other core while ptp device unregistering, call synchronize_irq() after HW is configured to stop producing irqs and no irqs are in-flight.

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.050160000 (date 2026-06-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a60fc3294a377204664b5484e4a487fa124155da aa03698bb28d3be5ee180adb185395054b342b04 git Not specified
CNA Linux Linux affected a60fc3294a377204664b5484e4a487fa124155da 627366c51145a07f675b1800fb5ea2ec960bd900 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/627366c51145a07f675b1800fb5ea2ec960bd900 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aa03698bb28d3be5ee180adb185395054b342b04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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