GHSA-5X8P-2X56-54GV
Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix buffer head management in ocfs2_read_blocks()
In ocfs2_read_blocks(), caller should't assume that buffer head returned by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops b_count from 1 to 0. If it is not so, buffer head remains on hold and likely to be returned by the next call to 'sb_getblk()' unchanged - that is, with BH_Uptodate bit set even if it has failed validation previously, thus allowing to insert that buffer head into OCFS2 metadata cache and submit it to upper layers. To avoid such a scenario, BH_Uptodate should be cleared immediately after 'validate()' callback has detected some data inconsistency.
{
"affected": [],
"aliases": [
"CVE-2026-80881"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-04T17:17:00Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix buffer head management in ocfs2_read_blocks()\n\nIn ocfs2_read_blocks(), caller should\u0027t assume that buffer head returned\nby \u0027sb_getblk()\u0027 is exclusively owned and so \u0027put_bh()\u0027 always drops\nb_count from 1 to 0. If it is not so, buffer head remains on hold and\nlikely to be returned by the next call to \u0027sb_getblk()\u0027 unchanged - that\nis, with BH_Uptodate bit set even if it has failed validation previously,\nthus allowing to insert that buffer head into OCFS2 metadata cache and\nsubmit it to upper layers. To avoid such a scenario, BH_Uptodate should\nbe cleared immediately after \u0027validate()\u0027 callback has detected some data\ninconsistency.",
"id": "GHSA-5x8p-2x56-54gv",
"modified": "2026-09-04T18:31:32Z",
"published": "2026-09-04T18:31:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80881"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17"
}
],
"schema_version": "1.4.0",
"severity": []
}
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.
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.
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.