CVE-2025-21817 (GCVE-0-2025-21817)
Vulnerability from cvelistv5 – Published: 2025-02-27 20:04 – Updated: 2026-09-07 15:44
VLAI
EPSS
VEX
Title
block: mark GFP_NOIO around sysfs ->store()
Summary
In the Linux kernel, the following vulnerability has been resolved:
block: mark GFP_NOIO around sysfs ->store()
sysfs ->store is called with queue freezed, meantime we have several
->store() callbacks(update_nr_requests, wbt, scheduler) to allocate
memory with GFP_KERNEL which may run into direct reclaim code path,
then potential deadlock can be caused.
Fix the issue by marking NOIO around sysfs ->store()
Severity
5.5 (Medium)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
1645cd7fd42c236c952e9228badcac4fea1829ea , < a09280c39ea54080daf19cfaf4a3121a8d17d5cd
(git)
Affected: 8985da5481562e96b95e94ed8e5cc9b6565eb82b , < 2566ce907e5d5db8a039647208e029ce559baa31 (git) Affected: c99f66e4084a62a2cc401c4704a84328aeddc9ec , < 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c (git) |
guessed | |
| Linux | Linux |
Affected:
6.12.96 , < 6.12.109
(semver)
Affected: 6.13.2 , < 6.13.3 (semver) |
guessed |
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}
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},
{
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: mark GFP_NOIO around sysfs -\u0026gt;store() sysfs -\u0026gt;store se llama con la cola congelada, mientras tanto tenemos varias devoluciones de llamadas -\u0026gt;store() (update_nr_requests, wbt, scheduler) para asignar memoria con GFP_KERNEL que puede ejecutarse en una ruta de c\u00f3digo de recuperaci\u00f3n directa, lo que puede provocar un posible bloqueo. Solucione el problema marcando NOIO alrededor de sysfs -\u0026gt;store()"
}
],
"id": "CVE-2025-21817",
"lastModified": "2026-09-07T16:17:27.213",
"metrics": {
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
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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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