CVE-2026-80881ocfs2: fix buffer head management in ocfs2_read_blocks()
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In 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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cf76c78595ca87548ca5e45c862ac9e0949c4687 before a4eae1499c760949a93459d11390bd1fd823d31d; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before 4ab17e328522a4df5fe0f0dcf39098118b1feeaa; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before 5927acb3e2c99985a14adecd9d1b67ba191c622d; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before ecb3f9386f4353034caef77239473c627232db17; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before 0e389fc290c350c67591abf4c367119f4689f310; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e; from cf76c78595ca87548ca5e45c862ac9e0949c4687 before 6371a07148ee979af22a9d6f4c277462953a9a4a; and 8 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d
- https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa
- https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d
- https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17
- https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766
- https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310
- https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e
- https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.