Riskcovery

CVE-2026-63837

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

State
Published
Severity
Not scored
Published
Jul 19, 2026
Updated
Jul 19, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

In 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • e0ea34158ee8c4f7536cd781010339ff28c0d24c to before bddf59818ae5102e6d82a4dae5add6df8da38fb0Affected
  • e0ea34158ee8c4f7536cd781010339ff28c0d24c to before edcb049d836e175e7b3d5e0d05657104545b5e65Affected
  • e0ea34158ee8c4f7536cd781010339ff28c0d24c to before 24a08d7d6218d60c033015cf4870b6096446e734Affected
LinuxLinux
  • 6.17Affected
  • before 6.17Not affected
  • 6.18.33 through 6.18.*Not affected
  • 7.0.10 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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