CVE-2026-3184— Util-linux: util-linux: access control bypass due to improper hostname canonicalization
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I. Basic Information for CVE-2026-3184
Vulnerability Information
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Vulnerability Title
Util-linux: util-linux: access control bypass due to improper hostname canonicalization
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用候选名称进行的认证绕过
Source: NVD (National Vulnerability Database)
Vulnerability Title
util-linux 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
util-linux是util-linux开源的一个软件包。 util-linux存在安全漏洞，该漏洞源于主机名规范化不当，可能导致远程攻击者绕过基于主机的PAM访问控制规则，获取未经授权的访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Hardened Images | 2.42-7.1.hum1 ~ * | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat Enterprise Linux 10 | - | cpe:/o:redhat:enterprise_linux:10 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat Enterprise Linux 8 | - | cpe:/o:redhat:enterprise_linux:8 | |
| Red Hat | Red Hat Enterprise Linux 9 | - | cpe:/o:redhat:enterprise_linux:9 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 |
II. Public POCs for CVE-2026-3184
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|---|
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- 2442570 – (CVE-2026-3184) CVE-2026-3184 util-linux: util-linux: Access control bypass due to improper hostname canonicalizationissue-trackingx_refsource_REDHAT
- https://nvd.nist.gov/vuln/detail/CVE-2026-3184
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