CVE-2026-43088
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: af_key: zero aligned sockaddr tail in PF_KEY exports
PF_KEY export paths use `pfkey_sockaddr_size()` when reserving sockaddr payload space, so IPv6 addresses occupy 32 bytes on the wire. However, `pfkey_sockaddr_fill()` initializes only the first 28 bytes of `struct sockaddr_in6`, leaving the final 4 aligned bytes uninitialized.
Not every PF_KEY message is affected. The state and policy dump builders already zero the whole message buffer before filling the sockaddr payloads. Keep the fix to the export paths that still append aligned sockaddr payloads with plain `skb_put()`:
Leer descripción completaMostrar menos
Fix those paths by clearing only the aligned sockaddr tail after `pfkey_sockaddr_fill()`.
Detalles técnicos trazas, registros y código del informe original
- `SADB_ACQUIRE` - `SADB_X_NAT_T_NEW_MAPPING` - `SADB_X_MIGRATE`
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
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/11cbf294bac623bd57296f231199193087f57b4a
- https://git.kernel.org/stable/c/2e74f974359b5382ecbe8536abbb5b837eb6c724
- https://git.kernel.org/stable/c/3c19cb8a84ef709d57943bd6664cf31cb91ba6ec
- https://git.kernel.org/stable/c/426c355742f02cf743b347d9d7dbdc1bfbfa31ef
- https://git.kernel.org/stable/c/6df5f90175fe4c584e9960b6c00131a7bf2b5399
- https://git.kernel.org/stable/c/746ee79d9e140f0e9e56f5123eaa88ad9332de7b
- https://git.kernel.org/stable/c/e357c3cf8a44d4ec1f49ad6981e4ab9704354347
- https://git.kernel.org/stable/c/edd446ee7cd3d02cac246168063d5b3e9ea68460
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: af_key: zero aligned sockaddr tail in PF_KEY exports\n\nPF_KEY export paths use `pfkey_sockaddr_size()` when reserving sockaddr\npayload space, so IPv6 addresses occupy 32 bytes on the wire. However,\n`pfkey_sockaddr_fill()` initializes only the first 28 bytes of\n`struct sockaddr_in6`, leaving the final 4 aligned bytes uninitialized.\n\nNot every PF_KEY message is affected. The state and policy dump builders\nalready zero the whole message buffer before filling the sockaddr\npayloads. Keep the fix to the export paths that still append aligned\nsockaddr payloads with plain `skb_put()`:\n\n - `SADB_ACQUIRE`\n - `SADB_X_NAT_T_NEW_MAPPING`\n - `SADB_X_MIGRATE`\n\nFix those paths by clearing only the aligned sockaddr tail after\n`pfkey_sockaddr_fill()`."
}
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"lastModified": "2026-09-14T12:17:40.640",
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