VYPR
High severity7.5NVD Advisory· Published Mar 20, 2026· Updated Apr 7, 2026

CVE-2026-4437

CVE-2026-4437

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, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.

Affected products

293

Patches

Vulnerability mechanics

References

1

News mentions

1