CVE-2026-48980
pam_usb: getenv() used in PAM context allows environment variable injection into local-check logic
Description
pam_usb provides hardware authentication for Linux using removable media. In versions prior to 0.9.2, getenv() environment variables XRDP_SESSION, DISPLAY and TMUX allow environment variable injection into local-check logic. These environment variables influence whether a current session is local or remote, and a PAM module that runs in the context of setuid binaries (sudo, su), getenv() returns attacker-controlled values whenever the process environment has been manipulated by a local user. This issue has been fixed in version 0.9.2.
INFO
Published Date :
June 18, 2026, 7:26 p.m.
Last Modified :
June 18, 2026, 7:26 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-48980
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update pam_usb to version 0.9.2.
- Monitor environment variables for unauthorized manipulation.
- Review PAM module configurations for secure defaults.
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CVE-2026-48980 vulnerability anywhere in the article.