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Vulnerabilities

Vulnerability · CVE-2026-3184

A flaw was found in util-linux.

Published Apr 3, 2026 · catalog updated Aug 31, 2026 · A flaw was found

Check if you run it

No confirmed exploitation is on record for CVE-2026-3184. EPSS is 0.44%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Advisory link
Affected products
cpe kernel/util-linux · cpe redhat/hardened images

A flaw was found in util-linux. Improper hostname canonicalization in the utility, when invoked with the option, can modify the supplied remote hostname before setting . 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe kernel/util-linuxversion unspecified
  • cpe redhat/hardened imagesversion unspecified

How to fix CVE-2026-3184

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-3184. EPSS is 0.44%. Act only if a listed version of A flaw was found is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-289. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 3, 2026 · NIST NVD

    Detected

    A flaw was found in util-linux. Improper hostname canonicalization in the utility, when invoked with the option, can modify the supplied remote hostname before setting . 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 lea

  2. Aug 31, 2026 · NIST NVD

    Updated

    A flaw was found in util-linux. Improper hostname canonicalization in the utility, when invoked with the option, can modify the supplied remote hostname before setting . 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 lea

Sources

  • CVE.orgVulnerability recordCVE-2026-3184

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3184

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3184

    A flaw was found in util-linux. Improper hostname canonicalization in the utility, when invoked with the option, can modify the supplied remote hostname before setting . A remote attacker could exploit this by providing a specially crafted hostname, pot

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.