CVE-2026-74521
CVE-2026-74521: 1 tracked advisory record across Red Hat. Compare vendor sources.
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Red Hat
1 advisory- Advisory severityMedium5.5
Medium [CVE-2026-74521] use memcmp to compare ClientGUIDs
CVE-2026-74521Source published Source updated
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. A flaw was found in ksmbd, a Linux kernel module that provides an in-kernel Server Message Block (SMB) server. This vulnerability stems from a logic error in how ClientGUIDs, which are unique client identifiers, are compared. This could lead to misidentification of clients during SMB3 multichannel session binding and validation, potentially impacting session…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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