PT-2026-61154 · Linux · Linux

CVE-2026-63837 · Publicado 2026-07-19 · Atualizado 2026-07-19

NVD

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.

Identificadores relacionados

CVE-2026-63837

Produtos afetados

Linux

Referências · 4

• https://git.kernel.org/stable/c/bddf59818ae5102e6d82a4dae5add6df8da38fb0 · Nota
• https://git.kernel.org/stable/c/24a08d7d6218d60c033015cf4870b6096446e734 · Nota
• https://git.kernel.org/stable/c/edcb049d836e175e7b3d5e0d05657104545b5e65 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-63837 · Nota de Segurança