{"action":"Upgrade bison to 2:3.7.2+dfsg-1 or later.","affected":[{"fixed":"2:3.7.2+dfsg-1","introduced":"0"}],"component":"bison","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2:3.7.2+dfsg-1"],"id":"tcs_01M5NETKXDX5GD3B83QG8EYHXT","modified_at":"2026-09-11T11:02:42.622662141Z","published_at":"2020-08-25T14:15:16.543Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-24240","https://security-tracker.debian.org/tracker/CVE-2020-24240"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-24240","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-24240"}],"summary":"GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input,"}