Not yet scoredPublished Dec 16, 2025

CVE-2025-68266bfs: Reconstruct file type when loading from disk

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 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).

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d0c5ec1f57d8fbb953f166a27d9d32473dc8f3e4; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before aeccd6743ee4fdd1ab8cfcbb5b9a20b613418f6d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8f73336b75bd3457b6f9410f2a0601a238f32238; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a9f626396bfe66f49b743601e862767928237cc0; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 77899444d46162aeb65f229590c26ba266864223; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a8cb796e7e2cb7971311ba236922f5e7e1be77e6; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 34ab4c75588c07cca12884f2bf6b0347c7a13872	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP

References

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
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.