CVE-2025-38078 (GCVE-0-2025-38078)
Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2026-10-15 21:52
VLAI
EPSS
VEX
Title
ALSA: pcm: Fix race of buffer access at PCM OSS layer
Summary
In the Linux kernel, the following vulnerability has been resolved:
ALSA: pcm: Fix race of buffer access at PCM OSS layer
The PCM OSS layer tries to clear the buffer with the silence data at
initialization (or reconfiguration) of a stream with the explicit call
of snd_pcm_format_set_silence() with runtime->dma_area. But this may
lead to a UAF because the accessed runtime->dma_area might be freed
concurrently, as it's performed outside the PCM ops.
For avoiding it, move the code into the PCM core and perform it inside
the buffer access lock, so that it won't be changed during the
operation.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:47 UTC
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c0e05a76fc727929524ef24a19c302e6dd40233f
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8170d8ec4efd0be352c14cb61f374e30fb0c2a25 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 10217da9644ae75cea7330f902c35fc5ba78bbbf (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f3e14d706ec18faf19f5a6e75060e140fea05d4a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 74d90875f3d43f3eff0e9861c4701418795d3455 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bf85e49aaf3a3c5775ea87369ea5f159c2148db4 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < afa56c960fcb4db37f2e3399f28e9402e4e1f470 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 93a81ca0657758b607c3f4ba889ae806be9beb73 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.4.294 , ≤ 5.4.* (semver) Unaffected: 5.10.238 , ≤ 5.10.* (semver) Unaffected: 5.15.185 , ≤ 5.15.* (semver) Unaffected: 6.1.141 , ≤ 6.1.* (semver) Unaffected: 6.6.93 , ≤ 6.6.* (semver) Unaffected: 6.12.31 , ≤ 6.12.* (semver) Unaffected: 6.14.9 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix) |
guessed |
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"matchCriteriaId": "2D240580-3048-49B2-9E27-F115A9DF8224",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*",
"matchCriteriaId": "90320558-E553-4EF5-8A0B-0F5D20113BD2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:*",
"matchCriteriaId": "C300BA32-5854-4B59-A00A-18A402F291D0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Fix race of buffer access at PCM OSS layer\n\nThe PCM OSS layer tries to clear the buffer with the silence data at\ninitialization (or reconfiguration) of a stream with the explicit call\nof snd_pcm_format_set_silence() with runtime-\u003edma_area. But this may\nlead to a UAF because the accessed runtime-\u003edma_area might be freed\nconcurrently, as it\u0027s performed outside the PCM ops.\n\nFor avoiding it, move the code into the PCM core and perform it inside\nthe buffer access lock, so that it won\u0027t be changed during the\noperation."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: pcm: Correcci\u00f3n de la ejecuci\u00f3n de acceso al b\u00fafer en la capa PCM OSS. La capa PCM OSS intenta borrar el b\u00fafer con los datos de silencio durante la inicializaci\u00f3n (o reconfiguraci\u00f3n) de un flujo mediante la llamada expl\u00edcita a snd_pcm_format_set_silence() con runtime-\u0026gt;dma_area. Sin embargo, esto puede generar una UAF, ya que el acceso a runtime-\u0026gt;dma_area podr\u00eda liberarse simult\u00e1neamente, ya que se realiza fuera de las operaciones PCM. Para evitarlo, mueva el c\u00f3digo al n\u00facleo PCM y ejec\u00fatelo dentro del bloqueo de acceso al b\u00fafer, de modo que no se modifique durante la operaci\u00f3n. "
}
],
"id": "CVE-2025-38078",
"lastModified": "2026-10-15T22:18:25.663",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.0,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-38078",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-15T21:47:07.593760Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-06-18T10:15:41.380",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/10217da9644ae75cea7330f902c35fc5ba78bbbf"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/74d90875f3d43f3eff0e9861c4701418795d3455"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/8170d8ec4efd0be352c14cb61f374e30fb0c2a25"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/93a81ca0657758b607c3f4ba889ae806be9beb73"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/afa56c960fcb4db37f2e3399f28e9402e4e1f470"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/bf85e49aaf3a3c5775ea87369ea5f159c2148db4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/c0e05a76fc727929524ef24a19c302e6dd40233f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f3e14d706ec18faf19f5a6e75060e140fea05d4a"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-10-30T02:58:19+00:00",
"cve": "CVE-2025-38078",
"id": "CVE-2025-38078",
"initial_release_date": "2025-06-18T00:00:00+00:00",
"product_status:known_affected": "60",
"product_status:known_not_affected": "216",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Linux kernel: Use-After-Free vulnerability in PCM OSS layer due to race condition",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38078.json",
"version": "3"
}
}
}
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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
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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.