net: ena: PHC: Check return code before setting timestamp output

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63837
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 15:16:50 UTC
Updated2026-07-19 15:16:50 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: ena: PHC: Check return code before setting timestamp output ena_phc_gettimex64() is setting the output parameter regardless of whether ena_com_phc_get_timestamp() succeeded or failed. When ena_com_phc_get_timestamp() returns an error, the timestamp parameter may contain uninitialized stack memory (e.g., when PHC is disabled or in blocked state) or invalid hardware values. Passing these to userspace via the PTP ioctl is both a security issue (information leak) and a correctness bug. Fix by checking the return code after releasing the lock and only setting the output timestamp on success.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.062410000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e0ea34158ee8c4f7536cd781010339ff28c0d24c bddf59818ae5102e6d82a4dae5add6df8da38fb0 git Not specified
CNA Linux Linux affected e0ea34158ee8c4f7536cd781010339ff28c0d24c edcb049d836e175e7b3d5e0d05657104545b5e65 git Not specified
CNA Linux Linux affected e0ea34158ee8c4f7536cd781010339ff28c0d24c 24a08d7d6218d60c033015cf4870b6096446e734 git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bddf59818ae5102e6d82a4dae5add6df8da38fb0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/24a08d7d6218d60c033015cf4870b6096446e734 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/edcb049d836e175e7b3d5e0d05657104545b5e65 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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