CVE Watch12 de nov. de 2026

CVE-2026-64669

pam_usb provides hardware authentication for Linux using removable media. From version 0.8.0 to before version 0.9.3, the deny_remote featur

CVSS

7.4

Alta

EPSS

0.4%

p33

KEV

—

Exploit Today

0-100

Publicado: 11 de nov. de 2026 · Última mod.: 12 de nov. de 2026 · CWE-285 · CWE-693

EPSS · 30d

Ainda não há histórico EPSS suficiente.

Descrição técnica

pam_usb provides hardware authentication for Linux using removable media. From version 0.8.0 to before version 0.9.3, the deny_remote feature in pam_usb uses /usr/bin/w -i to detect whether the authenticating user has an active remote tmux session. In pusb_tmux_has_remote_clients() (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.

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