FKIE_CVE-2025-39902
Vulnerability from fkie_nvd - Published: 2025-10-01 08:15 - Updated: 2026-10-19 21:10
Severity
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/
Summary
In the Linux kernel, the following vulnerability has been resolved:
mm/slub: avoid accessing metadata when pointer is invalid in object_err()
object_err() reports details of an object for further debugging, such as
the freelist pointer, redzone, etc. However, if the pointer is invalid,
attempting to access object metadata can lead to a crash since it does
not point to a valid object.
One known path to the crash is when alloc_consistency_checks()
determines the pointer to the allocated object is invalid because of a
freelist corruption, and calls object_err() to report it. The debug code
should report and handle the corruption gracefully and not crash in the
process.
In case the pointer is NULL or check_valid_pointer() returns false for
the pointer, only print the pointer value and skip accessing metadata.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 6.17 | |
| linux | linux_kernel | 6.17 | |
| linux | linux_kernel | 6.17 | |
| linux | linux_kernel | 6.17 | |
| debian | debian_linux | 11.0 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"mm/slub.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "872f2c34ff232af1e65ad2df86d61163c8ffad42",
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
"lessThan": "f66012909e7bf383fcdc5850709ed5716073fdc4",
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
"lessThan": "7e287256904ee796c9477e3ec92b07f236481ef3",
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
"lessThan": "1f0797f17927b5cad0fb7eced422f9a7c30a3191",
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
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"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
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"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
"lessThan": "3baa1da473e6e50281324ff1d332d1a07a3bb02e",
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
},
{
"lessThan": "b4efccec8d06ceb10a7d34d7b1c449c569d53770",
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"mm/slub.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.22"
},
{
"lessThan": "2.6.22",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.299",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.243",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.192",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.151",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
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"negate": false,
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},
{
"nodes": [
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slub: avoid accessing metadata when pointer is invalid in object_err()\n\nobject_err() reports details of an object for further debugging, such as\nthe freelist pointer, redzone, etc. However, if the pointer is invalid,\nattempting to access object metadata can lead to a crash since it does\nnot point to a valid object.\n\nOne known path to the crash is when alloc_consistency_checks()\ndetermines the pointer to the allocated object is invalid because of a\nfreelist corruption, and calls object_err() to report it. The debug code\nshould report and handle the corruption gracefully and not crash in the\nprocess.\n\nIn case the pointer is NULL or check_valid_pointer() returns false for\nthe pointer, only print the pointer value and skip accessing metadata."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmm/slub: evitar acceder a metadatos cuando el puntero es inv\u00e1lido en object_err()\n\nobject_err() informa detalles de un objeto para depuraci\u00f3n adicional, como el puntero de la freelist, la redzone, etc. Sin embargo, si el puntero es inv\u00e1lido, intentar acceder a los metadatos del objeto puede provocar un fallo ya que no apunta a un objeto v\u00e1lido.\n\nUna ruta conocida al fallo es cuando alloc_consistency_checks() determina que el puntero al objeto asignado es inv\u00e1lido debido a una corrupci\u00f3n de la freelist, y llama a object_err() para informarlo. El c\u00f3digo de depuraci\u00f3n deber\u00eda informar y manejar la corrupci\u00f3n de manera elegante y no fallar en el proceso.\n\nEn caso de que el puntero sea NULL o check_valid_pointer() devuelva falso para el puntero, solo imprimir el valor del puntero y omitir el acceso a los metadatos."
}
],
"id": "CVE-2025-39902",
"lastModified": "2026-10-19T21:10:00.160",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.2,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
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"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"
}
],
"ssvcV203": [
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"options": [
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{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-15T21:54:38.930497Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-10-01T08:15:32.993",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
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"value": "CWE-476"
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]
}
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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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- Exploited: The vulnerability was observed as exploited 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
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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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