CVE-2026-3184

Name: CVE-2026-3184
Creator: NVD / NIST
Published: 2026-04-03T19:17:23.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2026-3184 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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`. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.44%

34.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-289

Affected Software

Vendor	Product	Versions
Kernel	Util-Linux	All versions
Redhat	Hardened Images	All versions

References

https://access.redhat.com/errata/RHSA-2026:7180Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-3184Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442570Issue Tracking, Third Party Advisory

Timeline

Published: Apr 3, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3184?

How severe is CVE-2026-3184?

CVE-2026-3184 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3184?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3184?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST