Highlights
Auth Bypass: 174 prior fixes. Scrutinize any change in this area.
src/exec_ptrace.c: most-fixed (28 issues). Treat as high-risk during review.
272 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Heap Buffer Overflow: Improper buffer handling and unescaping of command-line arguments in heap memory allowed local attackers to escalate privileges to root, a critical vulnerability known as Baron Samedit.
Auth Bypass: A major logical flaw where converting user IDs like -1 or 4294967295 incorrectly resolved to root, allowing complete policy blacklist bypasses.
Privilege Escalation: Mishandling of user-supplied environment variables (SUDO_EDITOR, VISUAL, EDITOR) in sudoedit allowed local users to write to arbitrary files and escalate privileges.