3.7lowLow
CVE-2026-3184
Kernel Util-Linux
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.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, exploitation depends on conditions outside the attacker's control.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 3.7 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness
- CWE-289
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2026-04-03
- Last modified
- 2026-08-31
- Sources
- NVD
Affected products
- Kernel Util-Linuxall versions
- Redhat Hardened Imagesall versions
As listed in the NVD configuration data. Not a statement about your estate.