CVE-2025-38675
Estado: ModificadaMedia (4.7)—
In the Linux kernel, the following vulnerability has been resolved:
xfrm: state: initialize state_ptrs earlier in xfrm_state_find
In case of preemption, xfrm_state_look_at will find a different pcpu_id and look up states for that other CPU. If we matched a state for CPU2 in the state_cache while the lookup started on CPU1, we will jump to "found", but the "best" state that we got will be ignored and we will enter the "acquire" block. This block uses state_ptrs, which isn't initialized at this point.
Let's initialize state_ptrs just after taking rcu_read_lock. This will also prevent a possible misuse in the future, if someone adjusts this function.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.12%
- Percentil entre todas las CVEs puntuadas: 2
- 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-362
Referencias
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: state: initialize state_ptrs earlier in xfrm_state_find\n\nIn case of preemption, xfrm_state_look_at will find a different\npcpu_id and look up states for that other CPU. If we matched a state\nfor CPU2 in the state_cache while the lookup started on CPU1, we will\njump to \"found\", but the \"best\" state that we got will be ignored and\nwe will enter the \"acquire\" block. This block uses state_ptrs, which\nisn't initialized at this point.\n\nLet's initialize state_ptrs just after taking rcu_read_lock. This will\nalso prevent a possible misuse in the future, if someone adjusts this\nfunction."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xfrm: state: inicializar state_ptrs antes en xfrm_state_find. En caso de preempción, xfrm_state_look_at encontrará un pcpu_id diferente y buscará los estados de esa otra CPU. Si se encontró un estado para la CPU2 en state_cache mientras la búsqueda se iniciaba en la CPU1, se saltará a \"found\", pero se ignorará el mejor estado obtenido y se accederá al bloque \"acquire\". Este bloque utiliza state_ptrs, que aún no está inicializado. Inicialicemos state_ptrs justo después de ejecutar rcu_read_lock. Esto también evitará un posible uso indebido en el futuro si alguien ajusta esta función."
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