CVE-2026-3184CWE-289

CVE-2026-3184

Low · published April 3, 2026

CVSS v3.1
3.7
EPSS
0%
Percentile
36.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.7 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00436 · 36.9th percentile
Weakness
CWE-289 · Authentication Bypass by Alternate Name
Published
2026-04-03T23:17Z
Affected products (2)
ProductVersionsFixed in
kernel/util-linuxall versions—
redhat/hardened_imagesall versions—
References (3)
https://access.redhat.com/errata/RHSA-2026:7180 · [email protected]https://access.redhat.com/security/cve/CVE-2026-3184 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2442570 · [email protected]
EPSS history
Timeline
  • 03 APR 18:43Z
    Util-linux: util-linux: access control bypass due to improper hostname canonicalization
    cvelistv5