CVE-2026-4438

CVSS Score & Metrics

Base Score

5.4 / 10

Vector String

                                        CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N                                    

Vulnerability Description

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.

Vulnerability Details

Published Date

March 20, 2026

Last Modified

March 23, 2026

CWE ID

CWE-20

Source

NVD

External References

https://sourceware.org/bugzilla/show_bug.cgi?id=34015

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