Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit() jbd2_journal_initialize_fast_commit() validates journal capacity by checking (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS). Both j_last and num_fc_blks are unsigned, so when num_fc_blks exceeds j_last the subtraction wraps to a large value, bypassing the bounds check. The resulting underflow corrupts j_last, j_fc_first, and j_free, leading to journal abort. Fix by checking num_fc_blks against j_last before the subtraction, returning -EFSCORRUPTED.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before aa90f00932bf572d6ef284c977c2a60b39c13bd6; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before e144ad0250f77e23e28949587b8b57e40dc3b512; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before 4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before fb9b49618ed7296ebfad62a3835da8945f727001; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before 4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before 78955fdce8ff654e6d33a2fa90882a1e7eb26330; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before a58fc10adf503969fec2007b5afe8987258046c4; affected 6866d7b3f2bb4f011041ba54c98b1584497fe2fd before 289a2ca0c9b7eae74f93fc213b0b971669b8683d |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.266 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/aa90f00932bf572d6ef284c977c2a60b39c13bd6
- https://git.kernel.org/stable/c/e144ad0250f77e23e28949587b8b57e40dc3b512
- https://git.kernel.org/stable/c/4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6
- https://git.kernel.org/stable/c/fb9b49618ed7296ebfad62a3835da8945f727001
- https://git.kernel.org/stable/c/4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9
- https://git.kernel.org/stable/c/78955fdce8ff654e6d33a2fa90882a1e7eb26330
- https://git.kernel.org/stable/c/a58fc10adf503969fec2007b5afe8987258046c4
- https://git.kernel.org/stable/c/289a2ca0c9b7eae74f93fc213b0b971669b8683d
ADP enrichment
No English description supplied.
No references supplied.