CVE-2026-80881
Description
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.
How to fix
- Linux Linuxa4eae1499c760949a93459d11390bd1fd823d31d, 4ab17e328522a4df5fe0f0dcf39098118b1feeaa, 5927acb3e2c99985a14adecd9d1b67ba191c622d, ecb3f9386f4353034caef77239473c627232db17, 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766, 0e389fc290c350c67591abf4c367119f4689f310, 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e, 6371a07148ee979af22a9d6f4c277462953a9a4a, 4.5, 4.10, 4.15, 4.20 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < a4eae1499c760949a93459d11390bd1fd823d31d, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < 4ab17e328522a4df5fe0f0dcf39098118b1feeaa, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < 5927acb3e2c99985a14adecd9d1b67ba191c622d, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < ecb3f9386f4353034caef77239473c627232db17, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < 0e389fc290c350c67591abf4c367119f4689f310, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e, cf76c78595ca87548ca5e45c862ac9e0949c4687 ≤ v < 6371a07148ee979af22a9d6f4c277462953a9a4a, 01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56, 65cbd1279f4b999d56a838344a30642db24cd215, 97e1db17bc1ef4c2e1789bc9323c7be44fba53f8, 6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc, 4.4.204 ≤ v < 4.5, 4.9.204 ≤ v < 4.10, 4.14.157 ≤ v < 4.15, 4.19.87 ≤ v < 4.20, 4.20 | a4eae1499c760949a93459d11390bd1fd823d31d, 4ab17e328522a4df5fe0f0dcf39098118b1feeaa, 5927acb3e2c99985a14adecd9d1b67ba191c622d, ecb3f9386f4353034caef77239473c627232db17, 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766, 0e389fc290c350c67591abf4c367119f4689f310, 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e, 6371a07148ee979af22a9d6f4c277462953a9a4a, 4.5, 4.10, 4.15, 4.20 |
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