CVE-2026-48066

MEDIUM EPSS 1.9%
Published May 27, 20261mo ago · Modified Jun 17, 20262w ago
5.7 CVSS 3.1
Medium
Find Similar
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 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.

CVSS Details

Base Score
5.7
Exploitability
1.4
Impact
4.2
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability High

Threat Intelligence

EPSS Exploit Probability
1.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-362
CWE-476 NULL Pointer Dereference Memory Safety

References 3

  • github.com https://github.com/mcdope/pam_usb/issues/350
  • github.com https://github.com/mcdope/pam_usb/issues/55
  • github.com https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.