CVE-2026-80881
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < a4eae1499c760949a93459d11390bd1fd823d31d | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < 4ab17e328522a4df5fe0f0dcf39098118b1feeaa | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < 5927acb3e2c99985a14adecd9d1b67ba191c622d | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < ecb3f9386f4353034caef77239473c627232db17 | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766 | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < 0e389fc290c350c67591abf4c367119f4689f310 | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e | affected |
| Linux | Linux | cf76c78595ca87548ca5e45c862ac9e0949c4687 < 6371a07148ee979af22a9d6f4c277462953a9a4a | affected |
| Linux | Linux | 01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56 | affected |
| Linux | Linux | 65cbd1279f4b999d56a838344a30642db24cd215 | affected |
| Linux | Linux | 97e1db17bc1ef4c2e1789bc9323c7be44fba53f8 | affected |
| Linux | Linux | 6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc | affected |
| Linux | Linux | 4.4.204 < 4.5 | affected |
| Linux | Linux | 4.9.204 < 4.10 | affected |
| Linux | Linux | 4.14.157 < 4.15 | affected |
| Linux | Linux | 4.19.87 < 4.20 | affected |
| Linux | Linux | 4.20 | affected |
| Linux | Linux | 0 < 4.20 | unaffected |
| Linux | Linux | 5.10.261 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.97 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.40 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
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
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