CVE-2025-68266: Linux

EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Linux Linux: from 2.6.12, before 5.10.248 (fixed in 5.10.248); from 5.11, before 5.15.198 (fixed in 5.15.198); from 5.16, before 6.1.160 (fixed in 6.1.160); from 6.2, before 6.6.120 (fixed in 6.6.120); from 6.7, before 6.12.62 (fixed in 6.12.62); from 6.13, before 6.17.12 (fixed in 6.17.12)
• Siemens SIMATIC s7-1500 CPU 1518-4 Pn/dp Mfp: from V3.1.6
• Siemens SIMATIC s7-1500 CPU 1518f-4 Pn/dp Mfp: from V3.1.6
• Siemens Siplus s7-1500 CPU 1518-4 Pn/dp Mfp: from V3.1.6

Published 2025-12-16. Last modified 2026-07-14.