{"action":"Upgrade glibc to 2.41-12+deb13u3 or later.","affected":[{"fixed":"2.41-12+deb13u3","introduced":"0"}],"component":"glibc","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["2.41-12+deb13u3"],"id":"tcs_01M5NS7QN6R5Q9ZDP8R1RQQF22","modified_at":"2026-10-01T03:03:14.528478145Z","published_at":"2026-03-20T20:16:49.623Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-4438","https://security-tracker.debian.org/tracker/CVE-2026-4438"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-4438#Debian:13/glibc","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-4438"}],"summary":"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 hostn"}