In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they still point inside the response buffer. A malformed referral can therefore make the computed pointer exceed the end of the buffer. The resulting negative max_len is then passed to cifs_strndup_from_utf16(), and the non-Unicode path forwards it to kstrndup() as a size_t, allowing strnlen() to read out of bounds. Validate each string offset before deriving the string pointer.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00215.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

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Vendors Products
References
Link Providers
https://git.kernel.org/stable/c/027a84ac6b50c12ef767c15abfc58aa865820e9e cve-icon cve-icon
https://git.kernel.org/stable/c/76c607b9353d377b1d1b11db50e743eee0ccf658 cve-icon cve-icon
https://git.kernel.org/stable/c/929a85932d14190988f1eafd6ee8cc68d66ace0b cve-icon cve-icon
https://git.kernel.org/stable/c/b784cd1c24d89bf71be2efe1e948ff7c03371e57 cve-icon cve-icon
https://git.kernel.org/stable/c/c37abc99bb3de3d3219ecef253d649f74117fd83 cve-icon cve-icon
https://git.kernel.org/stable/c/d64b6be5740ce230aca184d8d224c75d9866045d cve-icon cve-icon
History

Sat, 15 Aug 2026 10:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
CWE-20

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server. Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they still point inside the response buffer. A malformed referral can therefore make the computed pointer exceed the end of the buffer. The resulting negative max_len is then passed to cifs_strndup_from_utf16(), and the non-Unicode path forwards it to kstrndup() as a size_t, allowing strnlen() to read out of bounds. Validate each string offset before deriving the string pointer.
Title cifs: validate DFS referral string offsets
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:55:31.682Z

Reserved: 2026-08-09T03:40:39.919Z

Link: CVE-2026-72318

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:04.737

Modified: 2026-08-15T06:22:04.737

Link: CVE-2026-72318

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T10:30:05Z