CVE-2026-44711

pam_usb: Symlink attacks on pad directory and pad files enable authentication bypass and root file corruption

State: Published
Severity: 7.9 High
Published: May 27, 2026
Updated: May 28, 2026
Reserved: May 7, 2026

Description

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, symlink attacks on pad directory and pad files enable authentication bypass and root file corruption. This vulnerability is fixed in 0.8.7.

Scores

CVSS	Score	Vector	Source
3.1	7.9 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H	GitHub_M

Weaknesses

CWE-59 Improper Link Resolution Before File Access ('Link Following')
CWE-287 Improper Authentication

Affected Products

Product	Versions
pam_usbmcdope	< 0.8.7Affected

References

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