CVE-2026-64380
HIGH
8.2
CVSS Severity Score
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posix_info_sid_size() reads sid[1] to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid[1] so all client paths that reuse the helper reject truncated POSIX SIDs safely.
Affected Platforms (CPE)
No CPE configurations currently published for this record.