CVE-2026-4438 Affecting glibc-langpack-lb package, versions <0:2.34-270.el9_8


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.19% (9th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ROCKY9-GLIBCLANGPACKLB-17110192
  • published31 May 2026
  • disclosed20 Mar 2026

Introduced: 20 Mar 2026

CVE-2026-4438  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 glibc-langpack-lb to version 0:2.34-270.el9_8 or higher.
This issue was patched in RLSA-2026:20597.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-langpack-lb package and not the glibc-langpack-lb package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C library version 2.34 to version 2.43 could result in an invalid DNS hostname being returned to the caller in violation of the DNS specification.

CVSS Base Scores

version 3.1