CVE-2026-80881 is a vulnerability in Linux Kernel
Published on September 4, 2026
ocfs2: fix buffer head management in ocfs2_read_blocks()
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.
Products Associated with CVE-2026-80881
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Affected Versions
Linux:- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below a4eae1499c760949a93459d11390bd1fd823d31d is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below 4ab17e328522a4df5fe0f0dcf39098118b1feeaa is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below 5927acb3e2c99985a14adecd9d1b67ba191c622d is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below ecb3f9386f4353034caef77239473c627232db17 is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766 is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below 0e389fc290c350c67591abf4c367119f4689f310 is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e is affected.
- Version cf76c78595ca87548ca5e45c862ac9e0949c4687 and below 6371a07148ee979af22a9d6f4c277462953a9a4a is affected.
- Version 01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56 is affected.
- Version 65cbd1279f4b999d56a838344a30642db24cd215 is affected.
- Version 97e1db17bc1ef4c2e1789bc9323c7be44fba53f8 is affected.
- Version 6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc is affected.
- Version 4.4.204 and below 4.5 is affected.
- Version 4.9.204 and below 4.10 is affected.
- Version 4.14.157 and below 4.15 is affected.
- Version 4.19.87 and below 4.20 is affected.
- Version 4.20 is affected.
- Before 4.20 is unaffected.
- Version 5.10.261, <= 5.10.* is unaffected.
- Version 5.15.212, <= 5.15.* is unaffected.
- Version 6.1.178, <= 6.1.* is unaffected.
- Version 6.6.145, <= 6.6.* is unaffected.
- Version 6.12.97, <= 6.12.* is unaffected.
- Version 6.18.40, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.