CVE-2026-48066 - pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication

CVE-2026-48066 - pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication

https://cvefeed.io/rssfeed/latest.atom / Wed, 05/27/2026 - 23:25
CVE ID :CVE-2026-48066
Published : May 27, 2026, 8:16 p.m. | 44 minutes 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.
Severity: 5.7 | MEDIUM
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