CVE-2026-52971
Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-416
Utilización después de liberación
Fecha de publicación:
24/06/2026
Última modificación:
14/07/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net: ena: PHC: Fix potential use-after-free in get_timestamp<br />
<br />
Move the phc->active check and resp pointer assignment to after<br />
acquiring the spinlock. Previously, phc->active was checked without<br />
holding the lock, and resp was cached from ena_dev->phc.virt_addr<br />
before the lock was acquired.<br />
<br />
If ena_com_phc_destroy() runs between the lockless active check and<br />
the lock acquisition, it sets active=false, releases the lock, frees<br />
the DMA memory, and sets virt_addr=NULL. The get_timestamp path would<br />
then read a NULL virt_addr and dereference it.<br />
<br />
With both the active check and the pointer read under the lock,<br />
destroy cannot free the memory while get_timestamp is using it.
Impacto
Puntuación base 3.x
7.80
Gravedad 3.x
ALTA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.17 (incluyendo) | 6.18.33 (excluyendo) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.19 (incluyendo) | 7.0.10 (excluyendo) |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página