CVE-2026-48985
Gravedad CVSS v3.1:
MEDIA
Tipo:
CWE-476
Desreferencia a puntero nulo (NULL)
Fecha de publicación:
18/06/2026
Última modificación:
22/06/2026
Descripción
*** Pendiente de traducción *** pam_usb provides hardware authentication for Linux using ordinary removable media. In versions 0.9.1 and below, pusb_is_loginctl_local() can cause a NULL dereference crash when parsing loginctl output. The function calls popen() and reads the result; if the Remote field is only a newline, fgets() succeeds but strtok_r(buf, "\n", &saveptr) returns NULL. A subsequent strcmp(is_remote, "no") then dereferences NULL, causing undefined behavior (typically SIGSEGV) and crashing the PAM module. This can crash the authenticating process (e.g., sudo, login) and, depending on PAM stack configuration, deny access for all users of the affected service. This issue has been fixed in version 0.9.2.
Impacto
Puntuación base 3.x
5.50
Gravedad 3.x
MEDIA