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 5.7EPSS 0.116%Risk 0.58
View source- Published
- 2026-05-27 20:16:40
- Affected versions
- <0.9.1
- Type
- Core software
- Vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H