# CVE-2025-68266

## Summary

- **CVE ID:** CVE-2025-68266
- **Severity:** UNKNOWN
- **CVSS Score:** 1.01
- **CWE:** N/A
- **Published:** Dec 16, 2025
- **Last Modified:** Sep 17, 2026

## Description

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 (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2)
- Linux — Linux (2.6.12)
- Linux — Linux (0)
- Linux — Linux (5.10.248)
- Linux — Linux (5.15.198)
- Linux — Linux (6.1.160)
- Linux — Linux (6.6.120)
- Linux — Linux (6.12.62)
- Linux — Linux (6.17.12)
- Linux — Linux (6.18)

## References

- [CNA](https://git.kernel.org/stable/c/d0c5ec1f57d8fbb953f166a27d9d32473dc8f3e4)
- [CNA](https://git.kernel.org/stable/c/aeccd6743ee4fdd1ab8cfcbb5b9a20b613418f6d)
- [CNA](https://git.kernel.org/stable/c/8f73336b75bd3457b6f9410f2a0601a238f32238)
- [CNA](https://git.kernel.org/stable/c/a9f626396bfe66f49b743601e862767928237cc0)
- [CNA](https://git.kernel.org/stable/c/77899444d46162aeb65f229590c26ba266864223)
- [CNA](https://git.kernel.org/stable/c/a8cb796e7e2cb7971311ba236922f5e7e1be77e6)
- [CNA](https://git.kernel.org/stable/c/34ab4c75588c07cca12884f2bf6b0347c7a13872)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-019113.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 9.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._