CVE-2026-3184: A flaw was found in util-linux

Routine

LOW 3.7REMOTEWATCHLISTMITIGATEMITIGATE

CVE-2026-3184 is a low-severity flaw (CVSS 3.7) affecting util-linux, hardened images. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 acces

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-289
Published	2026-04-03
Last modified	2026-08-31

Publisher (CNA): Red Hat, Inc. · Vendor: kernel · redhat

Last updated 2026-08-31 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 19:17 UTCPublished CVE record published
2026-08-31 12:17 UTCUpdated Record last modified

kernel util-linux MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy util-linux || rpm -q util-linux || util-linux --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

redhat hardened images MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hardened-images || rpm -q hardened-images || hardened-images --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3184?

util-linux: mitigate or apply the listed mitigation; hardened images: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-3184 being exploited?

CVE-2026-3184 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3184 affect?

CVE-2026-3184 affects util-linux, hardened images. Severity is low (CVSS 3.7). 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 pro

How urgent is CVE-2026-3184?

Priority 32/100. Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-27456 MEDIUM 4.7 UPGRADE util-linux is a random collection of Linux utilities

References

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