Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bfs: Reconstruct file type when loading from disk syzbot is reporting that S_IFMT bits of inode->i_mode can become bogus when the S_IFMT bits of the 32bits "mode" field loaded from disk are corrupted or when the 32bits "attributes" field loaded from disk are corrupted. A documentation says that BFS uses only lower 9 bits of the "mode" field. But I can't find an explicit explanation that the unused upper 23 bits (especially, the S_IFMT bits) are initialized with 0. Therefore, ignore the S_IFMT bits of the "mode" field loaded from disk. Also, verify that the value of the "attributes" field loaded from disk is either BFS_VREG or BFS_VDIR (because BFS supports only regular files and the root directory).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d0c5ec1f57d8fbb953f166a27d9d32473dc8f3e4; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before aeccd6743ee4fdd1ab8cfcbb5b9a20b613418f6d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8f73336b75bd3457b6f9410f2a0601a238f32238; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a9f626396bfe66f49b743601e862767928237cc0; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 77899444d46162aeb65f229590c26ba266864223; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a8cb796e7e2cb7971311ba236922f5e7e1be77e6; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 34ab4c75588c07cca12884f2bf6b0347c7a13872 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.248 through 5.10.*; unaffected 5.15.198 through 5.15.*; unaffected 6.1.160 through 6.1.*; unaffected 6.6.120 through 6.6.*; unaffected 6.12.62 through 6.12.*; unaffected 6.17.12 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d0c5ec1f57d8fbb953f166a27d9d32473dc8f3e4
- https://git.kernel.org/stable/c/aeccd6743ee4fdd1ab8cfcbb5b9a20b613418f6d
- https://git.kernel.org/stable/c/8f73336b75bd3457b6f9410f2a0601a238f32238
- https://git.kernel.org/stable/c/a9f626396bfe66f49b743601e862767928237cc0
- https://git.kernel.org/stable/c/77899444d46162aeb65f229590c26ba266864223
- https://git.kernel.org/stable/c/a8cb796e7e2cb7971311ba236922f5e7e1be77e6
- https://git.kernel.org/stable/c/34ab4c75588c07cca12884f2bf6b0347c7a13872
ADP enrichment
No English description supplied.