FKIE_CVE-2025-37863
Vulnerability from fkie_nvd - Published: 2025-05-09 07:16 - Updated: 2026-06-17 09:15
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
ovl: don't allow datadir only
In theory overlayfs could support upper layer directly referring to a data
layer, but there's no current use case for this.
Originally, when data-only layers were introduced, this wasn't allowed,
only introduced by the "datadir+" feature, but without actually handling
this case, resulting in an Oops.
Fix by disallowing datadir without lowerdir.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 6.15 | |
| linux | linux_kernel | 6.15 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/overlayfs/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0874b629f65320778e7e3e206177770666d9db18",
"status": "affected",
"version": "cc0918b3582c98f12cfb30bf7496496d14bff3e9",
"versionType": "git"
},
{
"lessThan": "b9e3579213ba648fa23f780e8d53e99011c62331",
"status": "affected",
"version": "24e16e385f2272b1a9df51337a5c32d28a29c7ad",
"versionType": "git"
},
{
"lessThan": "21d2ffb0e9838a175064c22f3a9de97d1f56f27d",
"status": "affected",
"version": "24e16e385f2272b1a9df51337a5c32d28a29c7ad",
"versionType": "git"
},
{
"lessThan": "eb3a04a8516ee9b5174379306f94279fc90424c4",
"status": "affected",
"version": "24e16e385f2272b1a9df51337a5c32d28a29c7ad",
"versionType": "git"
},
{
"lessThan": "6.6.88",
"status": "affected",
"version": "6.6.23",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/overlayfs/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.88",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.25",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.14.*",
"status": "unaffected",
"version": "6.14.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F1ECACC5-D719-4DD5-9E3F-A7A06FEF17D6",
"versionEndExcluding": "6.6.88",
"versionStartIncluding": "6.6.23",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8E59EE65-FA6B-4AE4-8125-26135E28BF35",
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"versionStartIncluding": "6.7",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "29FA1A8E-1C2A-4B0B-B397-2C915ECDEDEE",
"versionEndExcluding": "6.14.4",
"versionStartIncluding": "6.13",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*",
"matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1",
"vulnerable": true
},
{
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"matchCriteriaId": "4C9D071F-B28E-46EC-AC61-22B913390211",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: don\u0027t allow datadir only\n\nIn theory overlayfs could support upper layer directly referring to a data\nlayer, but there\u0027s no current use case for this.\n\nOriginally, when data-only layers were introduced, this wasn\u0027t allowed,\nonly introduced by the \"datadir+\" feature, but without actually handling\nthis case, resulting in an Oops.\n\nFix by disallowing datadir without lowerdir."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ovl: no se permite solo datadir. En teor\u00eda, overlayfs podr\u00eda permitir que la capa superior haga referencia directa a una capa de datos, pero actualmente no existe un caso pr\u00e1ctico para esto. Originalmente, cuando se introdujeron las capas de solo datos, esto no se permit\u00eda; solo se introdujo mediante la funci\u00f3n \"datadir+\", pero sin gestionar este caso, lo que resultaba en un error. Se soluciona deshabilitando datadir sin lowerdir."
}
],
"id": "CVE-2025-37863",
"lastModified": "2026-06-17T09:15:35.453",
"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": "2025-05-09T07:16:07.317",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/0874b629f65320778e7e3e206177770666d9db18"
},
{
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"url": "https://git.kernel.org/stable/c/eb3a04a8516ee9b5174379306f94279fc90424c4"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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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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