GHSA-X2V6-JX2X-C364
Vulnerability from github – Published: 2025-09-12 18:31 – Updated: 2026-07-14 15:31
VLAI
Details
In the Linux kernel, the following vulnerability has been resolved:
block: avoid possible overflow for chunk_sectors check in blk_stack_limits()
In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value.
However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2025-39795"
],
"database_specific": {
"cwe_ids": [
"CWE-674"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-12T16:15:33Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: avoid possible overflow for chunk_sectors check in blk_stack_limits()\n\nIn blk_stack_limits(), we check that the t-\u003echunk_sectors value is a\nmultiple of the t-\u003ephysical_block_size value.\n\nHowever, by finding the chunk_sectors value in bytes, we may overflow\nthe unsigned int which holds chunk_sectors, so change the check to be\nbased on sectors.",
"id": "GHSA-x2v6-jx2x-c364",
"modified": "2026-07-14T15:31:27Z",
"published": "2025-09-12T18:31:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39795"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dc"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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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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