CVE-2026-48066: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in mcdope pam_usb
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.
CVE-2026-48066: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in mcdope pam_usb
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 v3.1
Score 5.7medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-20T18:25:25.707Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a17519de29bf47b50e771bc
Added to database: 5/27/2026, 8:18:37 PM
Last updated: 5/27/2026, 8:19:27 PM
Views: 1
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