CVE-2026-4438EPSS p22.4%

CVE-2026-4438CVE-2026-4438

gnu / glibc

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 result in an invalid DNS hostname being returned to the caller in violation of the DNS specification.

Scoring

CVSS 5.4 ()
VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS0.32% probability of exploitation · percentile 22.4% · 2026-10-06T12:00:23Z
Last modified2026-07-14
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.