CVE-2025-68266None▾ SunlitIn 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" fiel…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
0.2% → 0.2%
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).
Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d0c5ec1f57d8fbb953f166a27d9d32473dc8f3e4Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < aeccd6743ee4fdd1ab8cfcbb5b9a20b613418f6dLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8f73336b75bd3457b6f9410f2a0601a238f32238Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a9f626396bfe66f49b743601e862767928237cc0Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 77899444d46162aeb65f229590c26ba266864223Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a8cb796e7e2cb7971311ba236922f5e7e1be77e6Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 34ab4c75588c07cca12884f2bf6b0347c7a13872Linux 2.6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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