CVE-2026-63837

CVE CVE-2026-63837EUVD EUVD-2026-45521Published 2026-07-19T14:04:33.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux e0ea34158ee8c4f7536cd781010339ff28c0d24c <edcb049d836e175e7b3d5e0d05657104545b5e65; e0ea34158ee8c4f7536cd781010339ff28c0d24c <bddf59818ae5102e6d82a4dae5add6df8da38fb0; 6.17; e0ea34158ee8c4f7536cd781010339ff28c0d24c <24a08d7d6218d60c033015cf4870b6096446e734; patch: 7.1; patch: 6.18.33; patch: 7.0.10; patch: 0

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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