PT-2026-50784 · Mcdope · Pam Usb

Publicado 2026-06-18 · Atualizado 2026-06-18 · CVE-2026-48983

NVD

CVSS v3.1

5.8

Média

Vetor base

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L

pam usb provides hardware authentication for Linux using ordinary removable media. In versions prior to 0.9.2, a symlink race condition exists in per-device and per-user pad directory creation. pam usb uses a check-then-act pattern: it calls lstat() to test for existence and then calls mkdir() separately to create the directory. A local attacker can win the race between these calls by replacing the target path with a symlink to a directory they control. If successful, one-time pad files may be written to an attacker-controlled location, potentially exposing future pad values before use or disrupting authentication. This issue has been fixed in version 0.9.2.

Correção

Time Of Check To Time Of Use

Enumeração de Fraquezas

CWE-367

Identificadores relacionados

CVE-2026-48983

Produtos afetados

Pam Usb

Referências · 3

• https://github.com/mcdope/pam_usb/releases/tag/0.9.2 · Nota
• https://github.com/mcdope/pam_usb/security/advisories/GHSA-4j8q-67fq-3xc3 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-48983 · Nota de Segurança