CVE-2026-47274
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
28/100
Published: 2026-05-27
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
High
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
None
Description
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, multiple pam_usb helper tools resolved external binaries through the PATH environment variable rather than using absolute paths. An attacker who can influence the process environment during PAM authentication or tool execution could substitute malicious binaries. The affected tools are pamusb-check (src/tmux.c), pamusb-conf (tools/pamusb-conf), and pamusb-keyring-unlock-gnome (tools/pamusb-keyring-unlock-gnome). This vulnerability is fixed in 0.9.0.