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CVE-2026-72318

9.4 · CRITICAL

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 t…

Published Aug 15, 2026EPSS 0.59%

Overview

CVE-2026-72318 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.4 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/027a84ac6b50c12ef767c15abfc58aa865820e9eRefgit.kernel.org/stable/c/76c607b9353d377b1d1b11db50e743eee0ccf658Refgit.kernel.org/stable/c/929a85932d14190988f1eafd6ee8cc68d66ace0bRefgit.kernel.org/stable/c/b784cd1c24d89bf71be2efe1e948ff7c03371e57Refgit.kernel.org/stable/c/c37abc99bb3de3d3219ecef253d649f74117fd83Refgit.kernel.org/stable/c/d64b6be5740ce230aca184d8d224c75d9866045d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72318?

CVE-2026-72318 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.4 (CRITICAL).

How severe is CVE-2026-72318?

This vulnerability has a CVSS 3.1 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-72318?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-72318?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72318 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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