Vulnerability in Kernel Util-Linux
CVE-2026-3184
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (37.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.004 · change: -0.002
Affected products
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:7180 (vendor-advisory, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2026-3184 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2026-3184?
- CVE-2026-3184 is a low-severity vulnerability in Kernel Util-Linux, classified under CWE-289. CVSS score: 3.7/10. Published 2026-04-03.
- How severe is CVE-2026-3184?
- Low severity. CVSS v3 base score is 3.7 out of 10.