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 versi
CVSS
5.4
Medium
EPSS
0.2%
p11
KEV
—
Exploit Today
3
0-100
Published: Mar 20, 2026 · Last modified: Jul 14, 2026 · CWE-20 · CWE-88
0.2%EPSS · 30 days0.2%
2026-06-302026-07-17
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.
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