CVE-2023-54293
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
bcache: fixup btree_cache_wait list damage
We get a kernel crash about "list_add corruption. next->prev should be prev (ffff9c801bc01210), but was ffff9c77b688237c. (next=ffffae586d8afe68)."
bch_btree_check_thread() and bch_dirty_init_thread() may call mca_cannibalize() to cannibalize other cached btree nodes. Only one thread can do it at a time, so the op of other threads will be added to the btree_cache_wait list.
We must call finish_wait() to remove op from btree_cache_wait before free it's memory address. Otherwise, the list will be damaged. Also should call bch_cannibalize_unlock() to release the btree_cache_alloc_lock and wake_up other waiters.
Detalles técnicos trazas, registros y código del informe original
crash> struct list_head 0xffff9c801bc01210
struct list_head {
next = 0xffffae586d8afe68,
prev = 0xffffae586d8afe68
}
crash> struct list_head 0xffff9c77b688237c
struct list_head {
next = 0x0,
prev = 0x0
}
crash> struct list_head 0xffffae586d8afe68
struct list_head struct: invalid kernel virtual address: ffffae586d8afe68 type: "gdb_readmem_callback"
Cannot access memory at address 0xffffae586d8afe68
[230469.019492] Call Trace:
[230469.032041] prepare_to_wait+0x8a/0xb0
[230469.044363] ? bch_btree_keys_free+0x6c/0xc0 [escache]
[230469.056533] mca_cannibalize_lock+0x72/0x90 [escache]
[230469.068788] mca_alloc+0x2ae/0x450 [escache]
[230469.080790] bch_btree_node_get+0x136/0x2d0 [escache]
[230469.092681] bch_btree_check_thread+0x1e1/0x260 [escache]
[230469.104382] ? finish_wait+0x80/0x80
[230469.115884] ? bch_btree_check_recurse+0x1a0/0x1a0 [escache]
[230469.127259] kthread+0x112/0x130
[230469.138448] ? kthread_flush_work_fn+0x10/0x10
[230469.149477] ret_from_fork+0x35/0x40CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 5/10/2026
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed
- https://git.kernel.org/stable/c/2882a4c4f0c90e99f37dbd8db369b9982fd613e7
- https://git.kernel.org/stable/c/bcb295778afda4f2feb0d3c0289a53fd43d5a3a6
- https://git.kernel.org/stable/c/cbdd5b3322f7bbe6454c97cac994757f1192c07b
- https://git.kernel.org/stable/c/f0854489fc07d2456f7cc71a63f4faf9c716ffbe
JSON original (NVD)
Mostrar
{
"id": "CVE-2023-54293",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"lessThan": "bcb295778afda4f2feb0d3c0289a53fd43d5a3a6",
"versionType": "git"
},
{
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"lessThan": "cbdd5b3322f7bbe6454c97cac994757f1192c07b",
"versionType": "git"
},
{
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"lessThan": "25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed",
"versionType": "git"
},
{
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"lessThan": "2882a4c4f0c90e99f37dbd8db369b9982fd613e7",
"versionType": "git"
},
{
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"lessThan": "f0854489fc07d2456f7cc71a63f4faf9c716ffbe",
"versionType": "git"
}
],
"programFiles": [
"drivers/md/bcache/btree.c",
"drivers/md/bcache/btree.h",
"drivers/md/bcache/writeback.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.188",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.121",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.39",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.4.4",
"versionType": "semver",
"lessThanOrEqual": "6.4.*"
},
{
"status": "unaffected",
"version": "6.5",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/md/bcache/btree.c",
"drivers/md/bcache/btree.h",
"drivers/md/bcache/writeback.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-30T13:16:18.383",
"references": [
{
"url": "https://git.kernel.org/stable/c/25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2882a4c4f0c90e99f37dbd8db369b9982fd613e7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bcb295778afda4f2feb0d3c0289a53fd43d5a3a6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cbdd5b3322f7bbe6454c97cac994757f1192c07b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f0854489fc07d2456f7cc71a63f4faf9c716ffbe",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: fixup btree_cache_wait list damage\n\nWe get a kernel crash about \"list_add corruption. next->prev should be\nprev (ffff9c801bc01210), but was ffff9c77b688237c.\n(next=ffffae586d8afe68).\"\n\ncrash> struct list_head 0xffff9c801bc01210\nstruct list_head {\n next = 0xffffae586d8afe68,\n prev = 0xffffae586d8afe68\n}\ncrash> struct list_head 0xffff9c77b688237c\nstruct list_head {\n next = 0x0,\n prev = 0x0\n}\ncrash> struct list_head 0xffffae586d8afe68\nstruct list_head struct: invalid kernel virtual address: ffffae586d8afe68 type: \"gdb_readmem_callback\"\nCannot access memory at address 0xffffae586d8afe68\n\n[230469.019492] Call Trace:\n[230469.032041] prepare_to_wait+0x8a/0xb0\n[230469.044363] ? bch_btree_keys_free+0x6c/0xc0 [escache]\n[230469.056533] mca_cannibalize_lock+0x72/0x90 [escache]\n[230469.068788] mca_alloc+0x2ae/0x450 [escache]\n[230469.080790] bch_btree_node_get+0x136/0x2d0 [escache]\n[230469.092681] bch_btree_check_thread+0x1e1/0x260 [escache]\n[230469.104382] ? finish_wait+0x80/0x80\n[230469.115884] ? bch_btree_check_recurse+0x1a0/0x1a0 [escache]\n[230469.127259] kthread+0x112/0x130\n[230469.138448] ? kthread_flush_work_fn+0x10/0x10\n[230469.149477] ret_from_fork+0x35/0x40\n\nbch_btree_check_thread() and bch_dirty_init_thread() may call\nmca_cannibalize() to cannibalize other cached btree nodes. Only one thread\ncan do it at a time, so the op of other threads will be added to the\nbtree_cache_wait list.\n\nWe must call finish_wait() to remove op from btree_cache_wait before free\nit's memory address. Otherwise, the list will be damaged. Also should call\nbch_cannibalize_unlock() to release the btree_cache_alloc_lock and wake_up\nother waiters."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbcache: corrección del daño en la lista btree_cache_wait\n\nObtenemos un fallo del kernel sobre 'corrupción de list_add. next->prev debería ser prev (ffff9c801bc01210), pero era ffff9c77b688237c. (next=ffffae586d8afe68).'\n\ncrash> struct list_head 0xffff9c801bc01210\nstruct list_head {\n next = 0xffffae586d8afe68,\n prev = 0xffffae586d8afe68\n}\ncrash> struct list_head 0xffff9c77b688237c\nstruct list_head {\n next = 0x0,\n prev = 0x0\n}\ncrash> struct list_head 0xffffae586d8afe68\nstruct list_head struct: dirección virtual de kernel inválida: ffffae586d8afe68 tipo: 'gdb_readmem_callback'\nNo se puede acceder a la memoria en la dirección 0xffffae586d8afe68\n\n[230469.019492] Rastro de Llamada:\n[230469.032041] prepare_to_wait+0x8a/0xb0\n[230469.044363] ? bch_btree_keys_free+0x6c/0xc0 [escache]\n[230469.056533] mca_cannibalize_lock+0x72/0x90 [escache]\n[230469.068788] mca_alloc+0x2ae/0x450 [escache]\n[230469.080790] bch_btree_node_get+0x136/0x2d0 [escache]\n[230469.092681] bch_btree_check_thread+0x1e1/0x260 [escache]\n[230469.104382] ? finish_wait+0x80/0x80\n[230469.115884] ? bch_btree_check_recurse+0x1a0/0x1a0 [escache]\n[230469.127259] kthread+0x112/0x130\n[230469.138448] ? kthread_flush_work_fn+0x10/0x10\n[230469.149477] ret_from_fork+0x35/0x40\n\nbch_btree_check_thread() y bch_dirty_init_thread() pueden llamar a mca_cannibalize() para canibalizar otros nodos btree en caché. Solo un hilo puede hacerlo a la vez, por lo que la operación de otros hilos se añadirá a la lista btree_cache_wait.\n\nDebemos llamar a finish_wait() para eliminar la operación de btree_cache_wait antes de liberar su dirección de memoria. De lo contrario, la lista se dañará. También se debe llamar a bch_cannibalize_unlock() para liberar el btree_cache_alloc_lock y despertar a otros en espera."
}
],
"lastModified": "2026-06-17T06:47:10.287",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}