{"action":"Upgrade bison to 3.7.2-r0 or later.","affected":[{"fixed":"3.7.2-r0","introduced":"0"}],"component":"bison","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.24","exploited":false,"fixed_versions":["3.7.2-r0"],"id":"tcs_01M5NCD8R2916S89FNHAP3HH7B","modified_at":"2026-10-26T11:17:55.148711104Z","published_at":"2020-08-25T14:15:16.543Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2020-24240","https://security.alpinelinux.org/vuln/CVE-2020-24240"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2020-24240#Alpine:v3.24/bison","url":"https://osv.dev/vulnerability/ALPINE-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,"}