CVE-2025-38393 (GCVE-0-2025-38393)
Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2026-08-05 12:01
VLAI
EPSS
VEX
Title
NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN
We found a few different systems hung up in writeback waiting on the same
page lock, and one task waiting on the NFS_LAYOUT_DRAIN bit in
pnfs_update_layout(), however the pnfs_layout_hdr's plh_outstanding count
was zero.
It seems most likely that this is another race between the waiter and waker
similar to commit ed0172af5d6f ("SUNRPC: Fix a race to wake a sync task").
Fix it up by applying the advised barrier.
Severity
7.5 (High)
Assigner
References
10 references
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8acc3e228e1c90bd410f73597a4549e0409f22d6 , < 08287df60bac5b008b6bcdb03053988335d3d282
(git)
Affected: ec23a86e060cbe30b62eb2955adc97c92d80cc4c , < 8846fd02c98da8b79e6343a20e6071be6f372180 (git) Affected: 880265c77ac415090090d1fe72a188fee71cb458 , < e4b13885e7ef1e64e45268feef1e5f0707c47e72 (git) Affected: 880265c77ac415090090d1fe72a188fee71cb458 , < 8ca65fa71024a1767a59ffbc6a6e2278af84735e (git) Affected: 880265c77ac415090090d1fe72a188fee71cb458 , < 864a54c1243ed3ca60baa4bc492dede1361f4c83 (git) Affected: 880265c77ac415090090d1fe72a188fee71cb458 , < 1f4da20080718f258e189a2c5f515385fa393da6 (git) Affected: 880265c77ac415090090d1fe72a188fee71cb458 , < c01776287414ca43412d1319d2877cbad65444ac (git) Affected: f133819e24e78f3aaaa00e9fa2b816d5f73fd172 (git) Affected: 5.10.124 , < 5.10.240 (semver) Affected: 5.15.49 , < 5.15.187 (semver) Affected: 5.18.6 , < 5.19 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.19
Unaffected: 0 , < 5.19 (semver) Unaffected: 5.10.240 , ≤ 5.10.* (semver) Unaffected: 5.15.187 , ≤ 5.15.* (semver) Unaffected: 6.1.144 , ≤ 6.1.* (semver) Unaffected: 6.6.97 , ≤ 6.6.* (semver) Unaffected: 6.12.37 , ≤ 6.12.* (semver) Unaffected: 6.15.6 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed |
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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\nNFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN\n\nWe found a few different systems hung up in writeback waiting on the same\npage lock, and one task waiting on the NFS_LAYOUT_DRAIN bit in\npnfs_update_layout(), however the pnfs_layout_hdr\u0027s plh_outstanding count\nwas zero.\n\nIt seems most likely that this is another race between the waiter and waker\nsimilar to commit ed0172af5d6f (\"SUNRPC: Fix a race to wake a sync task\").\nFix it up by applying the advised barrier."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4/pNFS: Correcci\u00f3n de una ejecuci\u00f3n para reactivar NFS_LAYOUT_DRAIN. Se encontraron varios sistemas bloqueados en espera de escritura diferida en el mismo bloqueo de p\u00e1gina, y una tarea esperando el bit NFS_LAYOUT_DRAIN en pnfs_update_layout(). Sin embargo, el recuento plh_outstanding de pnfs_layout_hdr era cero. Lo m\u00e1s probable es que se trate de otra ejecuci\u00f3n entre el que espera y el que reactiva, similar al commit ed0172af5d6f (\"SUNRPC: Correcci\u00f3n de una ejecuci\u00f3n para reactivar una tarea de sincronizaci\u00f3n\"). Se soluciona aplicando la barrera recomendada."
}
],
"id": "CVE-2025-38393",
"lastModified": "2026-07-30T06:23:11.647",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"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"
}
]
},
"published": "2025-07-25T13:15:28.723",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
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},
{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
}
],
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"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-30T09:12:29+00:00",
"cve": "CVE-2025-38393",
"id": "CVE-2025-38393",
"initial_release_date": "2025-07-25T00:00:00+00:00",
"product_status:fixed": "441",
"product_status:known_affected": "128",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38393.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-05T23:37:25Z",
"cve": "CVE-2025-38393",
"id": "CVE-2025-38393",
"initial_release_date": "2025-07-28T23:23:51Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "537",
"product_status:known_not_affected": "299",
"product_status:recommended": "519",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-38393",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38393.json",
"version": "45"
}
}
}
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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.
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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.
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