Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-64380

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 37.2%
CVSS Severity
CVSS v3 Score 8.2
Products affected by CVE-2026-64380


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