CVE-2025-22057
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: decrease cached dst counters in dst_release
Upstream fix ac888d58869b ("net: do not delay dst_entries_add() in dst_release()") moved decrementing the dst count from dst_destroy to dst_release to avoid accessing already freed data in case of netns dismantle. However in case CONFIG_DST_CACHE is enabled and OvS+tunnels are used, this fix is incomplete as the same issue will be seen for cached dsts:
Fix this by invalidating the cache, and thus decrementing cached dst counters, in dst_release too.
Detalles técnicos trazas, registros y código del informe original
Unable to handle kernel paging request at virtual address ffff5aabf6b5c000 Call trace: percpu_counter_add_batch+0x3c/0x160 (P) dst_release+0xec/0x108 dst_cache_destroy+0x68/0xd8 dst_destroy+0x13c/0x168 dst_destroy_rcu+0x1c/0xb0 rcu_do_batch+0x18c/0x7d0 rcu_core+0x174/0x378 rcu_core_si+0x18/0x30
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: 0.21%
- Percentil entre todas las CVEs puntuadas: 11
- 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/3a0a3ff6593d670af2451ec363ccb7b18aec0c0a
- https://git.kernel.org/stable/c/836415a8405c9665ae55352fc5ba865c242f5e4f
- https://git.kernel.org/stable/c/92a5c18513117be69bc00419dd1724c1940f8fcd
- https://git.kernel.org/stable/c/ccc331fd5bcae131d2627d5ef099d4a1f6540aea
- https://git.kernel.org/stable/c/e833e7ad64eb2f63867f65303be49ca30ee8819e
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: decrease cached dst counters in dst_release\n\nUpstream fix ac888d58869b (\"net: do not delay dst_entries_add() in\ndst_release()\") moved decrementing the dst count from dst_destroy to\ndst_release to avoid accessing already freed data in case of netns\ndismantle. However in case CONFIG_DST_CACHE is enabled and OvS+tunnels\nare used, this fix is incomplete as the same issue will be seen for\ncached dsts:\n\n Unable to handle kernel paging request at virtual address ffff5aabf6b5c000\n Call trace:\n percpu_counter_add_batch+0x3c/0x160 (P)\n dst_release+0xec/0x108\n dst_cache_destroy+0x68/0xd8\n dst_destroy+0x13c/0x168\n dst_destroy_rcu+0x1c/0xb0\n rcu_do_batch+0x18c/0x7d0\n rcu_core+0x174/0x378\n rcu_core_si+0x18/0x30\n\nFix this by invalidating the cache, and thus decrementing cached dst\ncounters, in dst_release too."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: disminuir los contadores dst en caché en dst_release La corrección ascendente ac888d58869b (\"net: no retrasar dst_entries_add() en dst_release()\") se movió y disminuyó el recuento dst de dst_destroy a dst_release para evitar acceder a datos ya liberados en caso de desmantelamiento de netns. Sin embargo, en caso de que CONFIG_DST_CACHE esté habilitado y se usen túneles OvS+, esta corrección está incompleta ya que se verá el mismo problema para los dst en caché: No se puede manejar la solicitud de paginación del núcleo en la dirección virtual ffff5aabf6b5c000 Rastreo de llamadas: percpu_counter_add_batch+0x3c/0x160 (P) dst_release+0xec/0x108 dst_cache_destroy+0x68/0xd8 dst_destroy+0x13c/0x168 dst_destroy_rcu+0x1c/0xb0 rcu_do_batch+0x18c/0x7d0 rcu_core+0x174/0x378 rcu_core_si+0x18/0x30 Corrija esto invalidando el caché y, por lo tanto, disminuyendo los contadores dst en caché. dst_release también."
}
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"lastModified": "2026-07-30T06:22:09.533",
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