medium5.4
CVE-2026-4438
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 …
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gnu | Glibc | from 2.34 through 2.43 |