Authentication Bypass by Alternate Name Affecting util-linux package, versions [,2.42-rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-UTILLINUX-15363411
- published27 Feb 2026
- disclosed25 Feb 2026
- creditAsim Viladi Oglu Manizada
Introduced: 25 Feb 2026
CVE-2026-3184 (opens in a new tab)How to fix?
Upgrade util-linux to version 2.42-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Authentication Bypass by Alternate Name via improper hostname canonicalization when invoked with -h. An attacker can bypass intended host-based access restrictions by supplying specially crafted hostnames during remote login attempts.
Note:
This is only exploitable if the target system is using PAM modules relying on PAM_RHOST for authorization decisions and have rules that distinguish between FQDNs and short hostnames.