FKIE_CVE-2023-53055
Vulnerability from fkie_nvd - Published: 2025-05-02 16:15 - Updated: 2026-06-17 06:44
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
fscrypt: destroy keyring after security_sb_delete()
fscrypt_destroy_keyring() must be called after all potentially-encrypted
inodes were evicted; otherwise it cannot safely destroy the keyring.
Since inodes that are in-use by the Landlock LSM don't get evicted until
security_sb_delete(), this means that fscrypt_destroy_keyring() must be
called *after* security_sb_delete().
This fixes a WARN_ON followed by a NULL dereference, only possible if
Landlock was being used on encrypted files.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 6.3 | |
| linux | linux_kernel | 6.3 | |
| linux | linux_kernel | 6.3 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "992a3f3e8a0c92151dfdf65fc85567c865fd558a",
"status": "affected",
"version": "e6f4fd85ef1ee6ab356bfbd64df28c1cb73aee7e",
"versionType": "git"
},
{
"lessThan": "d77531fac6a1fd9f1db0195438ba5419d72b96c4",
"status": "affected",
"version": "d7e7b9af104c7b389a0c21eb26532511bce4b510",
"versionType": "git"
},
{
"lessThan": "497ab5d9c7852dfedab2c9de75e41b60e54b7c5d",
"status": "affected",
"version": "d7e7b9af104c7b389a0c21eb26532511bce4b510",
"versionType": "git"
},
{
"lessThan": "ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a",
"status": "affected",
"version": "d7e7b9af104c7b389a0c21eb26532511bce4b510",
"versionType": "git"
},
{
"status": "affected",
"version": "391cceee6d435e616f68631e68f5b32d480b1e67",
"versionType": "git"
},
{
"status": "affected",
"version": "68d15d6558a386f46d815a6ac39edecad713a1bf",
"versionType": "git"
},
{
"lessThan": "5.15.105",
"status": "affected",
"version": "5.15.78",
"versionType": "semver"
},
{
"lessThan": "5.11",
"status": "affected",
"version": "5.10.154",
"versionType": "semver"
},
{
"lessThan": "6.1",
"status": "affected",
"version": "6.0.8",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"lessThan": "6.1",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.22",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
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"matchCriteriaId": "38E90823-50E2-40DF-BB78-E1A2B39ED662",
"versionEndExcluding": "5.11",
"versionStartIncluding": "5.10.154",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4D63521B-0F26-49B1-B862-EF7E310E9381",
"versionEndExcluding": "5.15.105",
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"vulnerable": true
},
{
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},
{
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"versionEndExcluding": "6.2.9",
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},
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{
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{
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}
],
"negate": false,
"operator": "OR"
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]
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: destroy keyring after security_sb_delete()\n\nfscrypt_destroy_keyring() must be called after all potentially-encrypted\ninodes were evicted; otherwise it cannot safely destroy the keyring.\nSince inodes that are in-use by the Landlock LSM don\u0027t get evicted until\nsecurity_sb_delete(), this means that fscrypt_destroy_keyring() must be\ncalled *after* security_sb_delete().\n\nThis fixes a WARN_ON followed by a NULL dereference, only possible if\nLandlock was being used on encrypted files."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fscrypt: destruir el anillo de claves despu\u00e9s de security_sb_delete(). fscrypt_destroy_keyring() debe llamarse despu\u00e9s de expulsar todos los inodos potencialmente cifrados; de lo contrario, no puede destruir el anillo de claves de forma segura. Dado que los inodos en uso por el LSM de Landlock no se expulsan hasta security_sb_delete(), esto significa que fscrypt_destroy_keyring() debe llamarse *despu\u00e9s* de security_sb_delete(). Esto corrige un WARN_ON seguido de una desreferencia a NULL, solo posible si Landlock se utilizaba en archivos cifrados."
}
],
"id": "CVE-2023-53055",
"lastModified": "2026-06-17T06:44:12.603",
"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": "2025-05-02T16:15:24.590",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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
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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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