CVE-2026-4438 Affecting glibc package, versions <2.40-160000.4.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.03% (10th percentile)

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  • Snyk IDSNYK-SLES1600-GLIBC-16121122
  • published22 Apr 2026
  • disclosed10 Apr 2026

Introduced: 10 Apr 2026

NewCVE-2026-4438  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 glibc to version 2.40-160000.4.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by SLES. See How to fix? for SLES:16.0.0 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