CVE-2026-74521
CVE CVE-2026-74521EUVD EUVD-2026-59714Published 2026-08-15T12:27:39.000ZLast changed 2026-08-17T05:48:13.000ZCVSS 9.1
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp() to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp() stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equal. Use memcmp() in SMB3 multichannel session binding and FSCTL_VALIDATE_NEGOTIATE_INFO to compare all SMB2_CLIENT_GUID_SIZE bytes.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.2; 5.15; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <e8bb506e6ef749ac0336f3e579d8d02396b7d832; patch: 0; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <d535363299822c5caa543787b21bd5cfa3e41949; patch: 7.1.8
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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