CVE-2026-74521
- Source
- https://cve.org/CVERecord?id=CVE-2026-74521
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74521.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74521
- Downstream
- Published
- 2026-08-15T12:27:39.330Z
- Modified
- 2026-08-18T03:56:30.367192381Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- ksmbd: use memcmp() to compare ClientGUIDs
- Details
-
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 FSCTLVALIDATENEGOTIATEINFO to compare all SMB2CLIENTGUIDSIZE bytes.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74521.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/d535363299822c5caa543787b21bd5cfa3e41949
- https://git.kernel.org/stable/c/e8bb506e6ef749ac0336f3e579d8d02396b7d832
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74521.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74521
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git