Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-3184
Red Hat Red Hat Hardened Images — Util-linux: util-linux: access control bypass due to improper hostname canonicalization
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N L N 5.3 .0062 47.9 —
AFFECTED
Product Versions Fixed
Red Hat Hardened Images unspecified 2.42-7.1.hum1
Red Hat Enterprise Linux 10 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
TIMELINE
Feb 25 Reserved by redhat
Apr 3 Published (CNA: redhat)
Aug 21 RESCORED — CVE-2026-3184 (Red Hat Hardened Images). CVSS 3.7 → 5.3 (NVD).
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| February 25, 2026 | Reserved | Reserved by redhat |
| April 3, 2026 | Published | Published (CNA: redhat) |
| August 21, 2026 | RESCORED | RESCORED — CVE-2026-3184 (Red Hat Hardened Images). CVSS 3.7 → 5.3 (NVD). |
Affected
Affected products and packages — 7 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Hardened Images | — | — | 2.42-7.1.hum1 |
| 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 OpenShift Container Platform 4 | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-3184 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
