NULL Pointer Dereference Affecting mcdope/pam_usb package, versions [,0.9.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 May 2026
- disclosed27 May 2026
- creditmcdope
Introduced: 27 May 2026
NewCVE-2026-47271 (opens in a new tab)How to fix?
Upgrade mcdope/pam_usb to version 0.9.0 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the xmalloc, xrealloc, and xstrdup functions due to the removal of out-of-memory guards when compiled with the -DNDEBUG flag. An attacker can cause the authentication process to crash by inducing memory allocation failures during authentication, resulting in a denial of service for all users attempting to authenticate.