CVE-2026-48980pam_usb: getenv() used in PAM context allows environment variable injection into local-check logic
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-454, CWE-807
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Jun 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mcdope pam_usb mcdope:pam_usb (from the name) | before 0.9.2 | CNA record |
References
- https://github.com/mcdope/pam_usb/security/advisories/GHSA-qr83-mf3h-fvqrx-refsource-confirm
- https://github.com/mcdope/pam_usb/releases/tag/0.9.2x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.