FKIE_CVE-2026-3184

Vulnerability from fkie_nvd - Published: 2026-04-03 19:17 - Updated: 2026-05-01 19:29
Severity
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:7180Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-3184Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2442570Issue Tracking, Third Party Advisory
Impacted products
Vendor Product Version
kernel util-linux -
redhat hardened_images -
To clipboard 

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      "value": "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."
    }
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  "id": "CVE-2026-3184",
  "lastModified": "2026-05-01T19:29:51.020",
  "metrics": {
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          "attackVector": "NETWORK",
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          "baseScore": 3.7,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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