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CVE-2026-4437
Published: Mar 20, 2026
Modified: Mar 23, 2026
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
The GNU C Library | glibc | affected 2.34 - <= 2.43 |
Weaknesses (CWE)
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