Is there a public exploit for CVE-2026-64669?

No public exploit for CVE-2026-64669 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-64669?

CVE-2026-64669 scores CVSS 7.4 (v3.1), rated high.

What does CVE-2026-64669 affect?

CVE-2026-64669 affects mcdope pam_usb.

7.4 High

pamusb provides hardware authentication for Linux using removable media.

CVE-2026-64669

pamusb provides hardware authentication for Linux using removable media. From version 0.8.0 to before version 0.9.3, the denyremote feature in pamusb uses /usr/bin/w -i to detect whether the authenticating user has an active remote tmux session. In pusbtmuxhasremoteclients() (src/tmux.c), the IPv6 detection regex required exactly four explicit colon-separated groups of 1-4 hex digits (e.g. 2001:0db8:85a3:0000). Any IPv6 address in compressed notation — including loopback (::1), link-local (fe80::1), and global unicast addresses (2001:db8::1) — did not match this pattern. As a result the remote-client check silently returned "no remote clients" even when a remote tmux client was connected from such an address. This issue has been patched in version 0.9.3.

Assessment

CVSS: 7.4 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 11 November 2026
Last updated: 11 November 2026
Affected: mcdope · pam_usb
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

At the source

EUVD (ENISA)

References

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