CVE-2026-4437
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Mar 20, 2026
Vendor
unknown
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.