CVE-2026-44713
HIGH EPSS 5.4%
Published May 27, 20261mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/tmux.c reads the user's $TMUX environment variable, splits it on commas, and interpolates the socket-path component directly into a shell command passed to popen(). Because the value is placed inside double-quotes without sanitisation, any value containing " terminates the quoted string and injects arbitrary shell syntax. popen() runs as root inside the PAM stack. This vulnerability is fixed in 0.8.7.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
5.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-116
CWE-78 OS Command Injection Injection
References 1
- github.com https://github.com/mcdope/pam_usb/security/advisories/GHSA-822m-whrh-vrj8
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.