CVE-2026-44710 — pam_usb: NULL pointer dereference from UDisks device fields causes PAM crash and login denial-of-service
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/device.c passed the return values of udisks_drive_get_serial(), udisks_dri…
Published: 2026-05-27 · CVSS: 4.6 · CVSS 3.1
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/device.c passed the return values of udisks_drive_get_serial(), udisks_drive_get_vendor(), and udisks_drive_get_model() directly to strcmp() without NULL checks. The GIO/UDisks API documentation states these accessors can return NULL for devices that do not expose the corresponding field. Passing NULL to strcmp() is undefined behaviour (typically a SIGSEGV). This vulnerability is fixed in 0.8.7.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7