CVE-2023-54293 (GCVE-0-2023-54293)
Vulnerability from cvelistv5 – Published: 2025-12-30 12:23 – Updated: 2026-05-11 19:59
VLAI
EPSS
VEX
Title
bcache: fixup btree_cache_wait list damage
Summary
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)."
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+0x35/0x40
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8e7102273f597dbb38af43da874f8c123f8e6dbe , < bcb295778afda4f2feb0d3c0289a53fd43d5a3a6
(git)
Affected: 8e7102273f597dbb38af43da874f8c123f8e6dbe , < cbdd5b3322f7bbe6454c97cac994757f1192c07b (git) Affected: 8e7102273f597dbb38af43da874f8c123f8e6dbe , < 25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed (git) Affected: 8e7102273f597dbb38af43da874f8c123f8e6dbe , < 2882a4c4f0c90e99f37dbd8db369b9982fd613e7 (git) Affected: 8e7102273f597dbb38af43da874f8c123f8e6dbe , < f0854489fc07d2456f7cc71a63f4faf9c716ffbe (git) |
guessed | |
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.188 , ≤ 5.10.* (semver) Unaffected: 5.15.121 , ≤ 5.15.* (semver) Unaffected: 6.1.39 , ≤ 6.1.* (semver) Unaffected: 6.4.4 , ≤ 6.4.* (semver) Unaffected: 6.5 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c",
"drivers/md/bcache/btree.h",
"drivers/md/bcache/writeback.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bcb295778afda4f2feb0d3c0289a53fd43d5a3a6",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "cbdd5b3322f7bbe6454c97cac994757f1192c07b",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "2882a4c4f0c90e99f37dbd8db369b9982fd613e7",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "f0854489fc07d2456f7cc71a63f4faf9c716ffbe",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c",
"drivers/md/bcache/btree.h",
"drivers/md/bcache/writeback.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.188",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.121",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.4.*",
"status": "unaffected",
"version": "6.4.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.5",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.188",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.121",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.39",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.4.4",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5",
"versionStartIncluding": "5.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003eprev should be\nprev (ffff9c801bc01210), but was ffff9c77b688237c.\n(next=ffffae586d8afe68).\"\n\ncrash\u003e struct list_head 0xffff9c801bc01210\nstruct list_head {\n next = 0xffffae586d8afe68,\n prev = 0xffffae586d8afe68\n}\ncrash\u003e struct list_head 0xffff9c77b688237c\nstruct list_head {\n next = 0x0,\n prev = 0x0\n}\ncrash\u003e 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\u0027s 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."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:59:09.658Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bcb295778afda4f2feb0d3c0289a53fd43d5a3a6"
},
{
"url": "https://git.kernel.org/stable/c/cbdd5b3322f7bbe6454c97cac994757f1192c07b"
},
{
"url": "https://git.kernel.org/stable/c/25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed"
},
{
"url": "https://git.kernel.org/stable/c/2882a4c4f0c90e99f37dbd8db369b9982fd613e7"
},
{
"url": "https://git.kernel.org/stable/c/f0854489fc07d2456f7cc71a63f4faf9c716ffbe"
}
],
"title": "bcache: fixup btree_cache_wait list damage",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-54293",
"datePublished": "2025-12-30T12:23:31.111Z",
"dateReserved": "2025-12-30T12:06:44.527Z",
"dateUpdated": "2026-05-11T19:59:09.658Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-54293",
"date": "2026-09-19",
"epss": "0.00197",
"percentile": "0.09698"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c",
"drivers/md/bcache/btree.h",
"drivers/md/bcache/writeback.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bcb295778afda4f2feb0d3c0289a53fd43d5a3a6",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "cbdd5b3322f7bbe6454c97cac994757f1192c07b",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "2882a4c4f0c90e99f37dbd8db369b9982fd613e7",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
},
{
"lessThan": "f0854489fc07d2456f7cc71a63f4faf9c716ffbe",
"status": "affected",
"version": "8e7102273f597dbb38af43da874f8c123f8e6dbe",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c",
"drivers/md/bcache/btree.h",
"drivers/md/bcache/writeback.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.188",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.121",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.4.*",
"status": "unaffected",
"version": "6.4.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.5",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"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-\u003eprev should be\nprev (ffff9c801bc01210), but was ffff9c77b688237c.\n(next=ffffae586d8afe68).\"\n\ncrash\u003e struct list_head 0xffff9c801bc01210\nstruct list_head {\n next = 0xffffae586d8afe68,\n prev = 0xffffae586d8afe68\n}\ncrash\u003e struct list_head 0xffff9c77b688237c\nstruct list_head {\n next = 0x0,\n prev = 0x0\n}\ncrash\u003e 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\u0027s 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: correcci\u00f3n del da\u00f1o en la lista btree_cache_wait\n\nObtenemos un fallo del kernel sobre \u0027corrupci\u00f3n de list_add. next-\u0026gt;prev deber\u00eda ser prev (ffff9c801bc01210), pero era ffff9c77b688237c. (next=ffffae586d8afe68).\u0027\n\ncrash\u0026gt; struct list_head 0xffff9c801bc01210\nstruct list_head {\n next = 0xffffae586d8afe68,\n prev = 0xffffae586d8afe68\n}\ncrash\u0026gt; struct list_head 0xffff9c77b688237c\nstruct list_head {\n next = 0x0,\n prev = 0x0\n}\ncrash\u0026gt; struct list_head 0xffffae586d8afe68\nstruct list_head struct: direcci\u00f3n virtual de kernel inv\u00e1lida: ffffae586d8afe68 tipo: \u0027gdb_readmem_callback\u0027\nNo se puede acceder a la memoria en la direcci\u00f3n 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 cach\u00e9. Solo un hilo puede hacerlo a la vez, por lo que la operaci\u00f3n de otros hilos se a\u00f1adir\u00e1 a la lista btree_cache_wait.\n\nDebemos llamar a finish_wait() para eliminar la operaci\u00f3n de btree_cache_wait antes de liberar su direcci\u00f3n de memoria. De lo contrario, la lista se da\u00f1ar\u00e1. Tambi\u00e9n se debe llamar a bch_cannibalize_unlock() para liberar el btree_cache_alloc_lock y despertar a otros en espera."
}
],
"id": "CVE-2023-54293",
"lastModified": "2026-06-17T06:47:10.287",
"metrics": {},
"published": "2025-12-30T13:16:18.383",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"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"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-30T10:33:18+00:00",
"cve": "CVE-2023-54293",
"id": "CVE-2023-54293",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: bcache: fixup btree_cache_wait list damage",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54293.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-07T16:43:13Z",
"cve": "CVE-2023-54293",
"id": "CVE-2023-54293",
"initial_release_date": "2025-12-31T00:26:32Z",
"product_status:known_affected": "401",
"product_status:known_not_affected": "248",
"product_status:recommended": "408",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-54293",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54293.json",
"version": "38"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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