CVE-2026-43043
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
crypto: af-alg - fix NULL pointer dereference in scatterwalk
The AF_ALG interface fails to unmark the end of a Scatter/Gather List (SGL) when chaining a new af_alg_tsgl structure. If a sendmsg() fills an SGL exactly to MAX_SGL_ENTS, the last entry is marked as the end. A subsequent sendmsg() allocates a new SGL and chains it, but fails to clear the end marker on the previous SGL's last data entry.
This causes the crypto scatterwalk to hit a premature end, returning NULL on sg_next() and leading to a kernel panic during dereference.
Leer descripción completaMostrar menos
Fix this by explicitly unmarking the end of the previous SGL when performing sg_chain() in af_alg_alloc_tsgl().
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: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
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-476
Referencias
- https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75
- https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948
- https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7
- https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb
- https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395
- https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49
- https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a
- https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04
JSON original (NVD)
Mostrar
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