CVE-2026-3184
LOWUtil-linux: util-linux: access control bypass due to improper hostname canonicalization
Title source: cnaDescription
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.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:7180
https://access.redhat.com/errata/RHSA-2026:7180
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-3184
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2442570
https://bugzilla.redhat.com/show_bug.cgi?id=2442570
Scores
CVSS v3
3.7
EPSS
0.0009
EPSS Percentile
24.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-289
Status
published
Products (10)
kernel/util-linux
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
Red Hat/Red Hat Hardened Images
Red Hat/Red Hat Hardened Images
2.42-7.1.hum1
Red Hat/Red Hat Hardened Images 1
Red Hat/Red Hat OpenShift Container Platform 4
redhat/hardened_images
Published
Apr 03, 2026
Tracked Since
Apr 04, 2026