Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2020-24240. Reason: This candidate is a reservation duplicate of CVE-2020-24240. Notes: All CVE users should reference CVE-2020-24240 instead of this candidate. All references and descriptions in this candidate have been removed to prevent accidental usage

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, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.