CVE-2026-3184 — Util-linux: util-linux: access control bypass due to improper hostname canonicalization
A flaw was found in util-linux. Improper hostname canonicalization in the `login(1)` utility, when invoked with the `-h` option, can modify the supplied remote hostname before s…
Published: 2026-04-03 · CVSS: 3.7 · CVSS 3.1
A flaw was found in util-linux. Improper hostname canonicalization in the `login(1)` utility, when invoked with the `-h` option, can modify the supplied remote hostname before setting `PAM_RHOST`. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing host-based Pluggable Authentication Modules (PAM) access control rules that rely on fully qualified domain names. This could lead to unauthorized access.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7