CVE-2026-63837
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.
How to fix
- Linux Linuxbddf59818ae5102e6d82a4dae5add6df8da38fb0, edcb049d836e175e7b3d5e0d05657104545b5e65, 24a08d7d6218d60c033015cf4870b6096446e734 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | e0ea34158ee8c4f7536cd781010339ff28c0d24c ≤ v < bddf59818ae5102e6d82a4dae5add6df8da38fb0, e0ea34158ee8c4f7536cd781010339ff28c0d24c ≤ v < edcb049d836e175e7b3d5e0d05657104545b5e65, e0ea34158ee8c4f7536cd781010339ff28c0d24c ≤ v < 24a08d7d6218d60c033015cf4870b6096446e734, 6.17 | bddf59818ae5102e6d82a4dae5add6df8da38fb0, edcb049d836e175e7b3d5e0d05657104545b5e65, 24a08d7d6218d60c033015cf4870b6096446e734 |
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