CVE-2025-71181
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
rust_binder: remove spin_lock() in rust_shrink_free_page()
When forward-porting Rust Binder to 6.18, I neglected to take commit fb56fdf8b9a2 ("mm/list_lru: split the lock to per-cgroup scope") into account, and apparently I did not end up running the shrinker callback when I sanity tested the driver before submission. This leads to crashes like the following:
*** DEADLOCK ***
May be due to missing lock nesting notation
To fix this, remove the spin_lock() call from rust_shrink_free_page().
Detalles técnicos trazas, registros y código del informe original
============================================
WARNING: possible recursive locking detected
6.18.0-mainline-maybe-dirty #1 Tainted: G IO
--------------------------------------------
kswapd0/68 is trying to acquire lock:
ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: lock_list_lru_of_memcg+0x128/0x230
but task is already holding lock:
ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&l->lock);
lock(&l->lock);
3 locks held by kswapd0/68:
#0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x597/0x1160
#1: ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20
#2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, at: lock_list_lru_of_memcg+0x2d/0x230CVSS
- 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: 0.12%
- 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-667
Referencias
JSON original (NVD)
Mostrar
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"id": "CVE-2025-71181",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust_binder: remove spin_lock() in rust_shrink_free_page()\n\nWhen forward-porting Rust Binder to 6.18, I neglected to take commit\nfb56fdf8b9a2 (\"mm/list_lru: split the lock to per-cgroup scope\") into\naccount, and apparently I did not end up running the shrinker callback\nwhen I sanity tested the driver before submission. This leads to crashes\nlike the following:\n\n\t============================================\n\tWARNING: possible recursive locking detected\n\t6.18.0-mainline-maybe-dirty #1 Tainted: G IO\n\t--------------------------------------------\n\tkswapd0/68 is trying to acquire lock:\n\tffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: lock_list_lru_of_memcg+0x128/0x230\n\n\tbut task is already holding lock:\n\tffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20\n\n\tother info that might help us debug this:\n\t Possible unsafe locking scenario:\n\n\t CPU0\n\t ----\n\t lock(&l->lock);\n\t lock(&l->lock);\n\n\t *** DEADLOCK ***\n\n\t May be due to missing lock nesting notation\n\n\t3 locks held by kswapd0/68:\n\t #0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x597/0x1160\n\t #1: ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, at: rust_helper_spin_lock+0xd/0x20\n\t #2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, at: lock_list_lru_of_memcg+0x2d/0x230\n\nTo fix this, remove the spin_lock() call from rust_shrink_free_page()."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nrust_binder: eliminar spin_lock() en rust_shrink_free_page()\n\nAl portar Rust Binder a la versión 6.18, descuidé tener en cuenta el commit fb56fdf8b9a2 ('mm/list_lru: split the lock to per-cgroup scope'), y aparentemente no terminé ejecutando la devolución de llamada del reductor cuando probé la cordura del controlador antes de la entrega. Esto lleva a fallos como el siguiente:\n\n\t============================================\n\tADVERTENCIA: posible bloqueo recursivo detectado\n\t6.18.0-mainline-maybe-dirty #1 Tainted: G IO\n\t--------------------------------------------\n\tkswapd0/68 está intentando adquirir el bloqueo:\n\tffff956000fa18b0 (&l->lock){+.+.}-{2:2}, en: lock_list_lru_of_memcg+0x128/0x230\n\n\tpero la tarea ya está manteniendo el bloqueo:\n\tffff956000fa18b0 (&l->lock){+.+.}-{2:2}, en: rust_helper_spin_lock+0xd/0x20\n\n\totra información que podría ayudarnos a depurar esto:\n\t Posible escenario de bloqueo inseguro:\n\n\t CPU0\n\t ----\n\t lock(&l->lock);\n\t lock(&l->lock);\n\n\t * INTERBLOQUEO *\n\n\t Puede deberse a la falta de notación de anidamiento de bloqueo\n\n\t3 bloqueos mantenidos por kswapd0/68:\n\t #0: ffffffff90d2e260 (fs_reclaim){+.+.}-{0:0}, en: kswapd+0x597/0x1160\n\t #1: ffff956000fa18b0 (&l->lock){+.+.}-{2:2}, en: rust_helper_spin_lock+0xd/0x20\n\t #2: ffffffff90cf3680 (rcu_read_lock){....}-{1:2}, en: lock_list_lru_of_memcg+0x2d/0x230\n\nPara solucionar esto, elimine la llamada a spin_lock() de rust_shrink_free_page()."
}
],
"lastModified": "2026-06-17T10:03:50.223",
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