{"action":"Upgrade libevent to 2.1.13-stable-1~deb13u1 or later.","affected":[{"fixed":"2.1.13-stable-1~deb13u1","introduced":"0"}],"component":"libevent","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["2.1.13-stable-1~deb13u1"],"id":"tcs_01M5NT9XDH6SVJBMM1Y6CMP2GS","modified_at":"2026-10-01T03:02:42.383917495Z","published_at":"2026-08-20T18:16:36.723Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-63387","https://security-tracker.debian.org/tracker/CVE-2026-63387"],"severity":{"label":"high","score":7},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-63387#Debian:13/libevent","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-63387"}],"summary":"Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an off-by-one stack buffer overflow in evdns.c when dnsname_to_labels formats a name-bearing DNS record at the"}