CVE-2023-53681 (GCVE-0-2023-53681)
Vulnerability from cvelistv5 – Published: 2025-10-07 15:21 – Updated: 2026-05-11 19:49
VLAI
EPSS
VEX
Title
bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent
Summary
In the Linux kernel, the following vulnerability has been resolved:
bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent
In some specific situations, the return value of __bch_btree_node_alloc
may be NULL. This may lead to a potential NULL pointer dereference in
caller function like a calling chain :
btree_split->bch_btree_node_alloc->__bch_btree_node_alloc.
Fix it by initializing the return value in __bch_btree_node_alloc.
Severity
5.5 (Medium)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 587b4e8bb5dac682f09280ab35db4632b29d5ac4
(git)
Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < b070f29a61436f6f8a2e3abc7ea4f4be81695198 (git) Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < a4405f6ee03323410d7b10966fd67b35f71b1944 (git) Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < f67b0e3081f2a24170280a33ac66f6b112083c03 (git) Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 7ecea5ce3dc17339c280c75b58ac93d8c8620d9f (git) Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 4514847aee18d9391a0cf3aad75d3567c72795a4 (git) Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 80fca8a10b604afad6c14213fdfd816c4eda3ee4 (git) |
guessed | |
| Linux | Linux |
Affected:
3.10
Unaffected: 0 , < 3.10 (semver) Unaffected: 4.19.291 , ≤ 4.19.* (semver) Unaffected: 5.4.253 , ≤ 5.4.* (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"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "587b4e8bb5dac682f09280ab35db4632b29d5ac4",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "b070f29a61436f6f8a2e3abc7ea4f4be81695198",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "a4405f6ee03323410d7b10966fd67b35f71b1944",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "f67b0e3081f2a24170280a33ac66f6b112083c03",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "7ecea5ce3dc17339c280c75b58ac93d8c8620d9f",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "4514847aee18d9391a0cf3aad75d3567c72795a4",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "80fca8a10b604afad6c14213fdfd816c4eda3ee4",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.10"
},
{
"lessThan": "3.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.291",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.253",
"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": "4.19.291",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.253",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.188",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.121",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.39",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.4.4",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5",
"versionStartIncluding": "3.10",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: Fix __bch_btree_node_alloc to make the failure behavior consistent\n\nIn some specific situations, the return value of __bch_btree_node_alloc\nmay be NULL. This may lead to a potential NULL pointer dereference in\ncaller function like a calling chain :\nbtree_split-\u003ebch_btree_node_alloc-\u003e__bch_btree_node_alloc.\n\nFix it by initializing the return value in __bch_btree_node_alloc."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:49:51.739Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4"
},
{
"url": "https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198"
},
{
"url": "https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944"
},
{
"url": "https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03"
},
{
"url": "https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f"
},
{
"url": "https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4"
},
{
"url": "https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4"
}
],
"title": "bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-53681",
"datePublished": "2025-10-07T15:21:35.315Z",
"dateReserved": "2025-10-07T15:16:59.664Z",
"dateUpdated": "2026-05-11T19:49:51.739Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-53681",
"date": "2026-11-01",
"epss": "0.00149",
"percentile": "0.04035"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "587b4e8bb5dac682f09280ab35db4632b29d5ac4",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "b070f29a61436f6f8a2e3abc7ea4f4be81695198",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "a4405f6ee03323410d7b10966fd67b35f71b1944",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "f67b0e3081f2a24170280a33ac66f6b112083c03",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "7ecea5ce3dc17339c280c75b58ac93d8c8620d9f",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "4514847aee18d9391a0cf3aad75d3567c72795a4",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
},
{
"lessThan": "80fca8a10b604afad6c14213fdfd816c4eda3ee4",
"status": "affected",
"version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/bcache/btree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.10"
},
{
"lessThan": "3.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.291",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.253",
"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"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "FA56B5FE-7C8B-4903-A9FE-B462D512C983",
"versionEndExcluding": "4.19.291",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0707E9FF-8CDE-4AC1-98F3-5BB74EF88F8A",
"versionEndExcluding": "5.4.253",
"versionStartIncluding": "4.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "43CAE50A-4A6C-488E-813C-F8DB77C13C8B",
"versionEndExcluding": "5.10.188",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "EC77775B-EC31-4966-966C-1286C02B2A85",
"versionEndExcluding": "5.15.121",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9BD1D4A1-304D-4187-8178-6D7C0050B1AF",
"versionEndExcluding": "6.1.39",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A91BC267-63EE-413E-A6EF-6B96C2A278D1",
"versionEndExcluding": "6.4.4",
"versionStartIncluding": "6.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: Fix __bch_btree_node_alloc to make the failure behavior consistent\n\nIn some specific situations, the return value of __bch_btree_node_alloc\nmay be NULL. This may lead to a potential NULL pointer dereference in\ncaller function like a calling chain :\nbtree_split-\u003ebch_btree_node_alloc-\u003e__bch_btree_node_alloc.\n\nFix it by initializing the return value in __bch_btree_node_alloc."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbcache: Correcci\u00f3n de __bch_btree_node_alloc para hacer que el comportamiento de fallo sea consistente\n\nEn algunas situaciones espec\u00edficas, el valor de retorno de __bch_btree_node_alloc puede ser NULL. Esto puede llevar a una potencial desreferencia de puntero NULL en la funci\u00f3n llamadora, como una cadena de llamadas:\nbtree_split -\u003e bch_btree_node_alloc -\u003e __bch_btree_node_alloc.\n\nSe corrige inicializando el valor de retorno en __bch_btree_node_alloc."
}
],
"id": "CVE-2023-53681",
"lastModified": "2026-10-28T20:10:00.163",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2025-10-07T16:15:52.287",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-30T10:19:20+00:00",
"cve": "CVE-2023-53681",
"id": "CVE-2023-53681",
"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: Fix __bch_btree_node_alloc to make the failure behavior consistent",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53681.json",
"version": "3"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
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.
Loading…
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.