CVE-2026-3184
Last modified
CVE-2026-3184 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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`. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Kernel | Util-Linux | All versions |
| Redhat | Hardened Images | All versions |
References
- https://access.redhat.com/errata/RHSA-2026:7180Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-3184Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2442570Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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