CVE-2026-53227
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: openvswitch: fix possible kfree_skb of ERR_PTR
After the patch in the "Fixes" tag, the allocation of the "reply" skb can happen either before or after locking the ovs_mutex.
However, error cleanups still follow the classical reversed order, assuming "reply" is allocated before locking: it is freed after unlocking.
If "reply" allocation happens after locking the mutex and it fails, "reply" is left with an ERR_PTR, and execution jumps to the correspondent cleanup stage which will try to free an invalid pointer.
Fix this by setting the pointer to NULL after having saved its error value.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.13%
- Percentil entre todas las CVEs puntuadas: 2
- Fecha de la puntuación: 3/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-401
Referencias
- https://git.kernel.org/stable/c/0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d
- https://git.kernel.org/stable/c/25fdf53698535fe8790237f5a8a9626791429785
- https://git.kernel.org/stable/c/895d1dd9057cde1687fa0f4286d47ceed0b82997
- https://git.kernel.org/stable/c/971b1b37774f13acc5add0a2843f8598446b8598
- https://git.kernel.org/stable/c/e248fb2e680deb2bd37bac551b72638fe4938a76
- https://git.kernel.org/stable/c/e3d509a1b71396e1452060dbf84a805fd1c3c549
- https://git.kernel.org/stable/c/ecc55aad3390129a87106841f4b68bf3d70c9264
- https://git.kernel.org/stable/c/ee30dd2909d8b98619f4341c70ec8dc8e155ab02
JSON original (NVD)
Mostrar
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