Highlights
Denial of Service: 2 prior fixes. Scrutinize any change in this area.
subprocess32.py: most-fixed (2 issues). Treat as high-risk during review.
0 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.
Denial of Service: Failures during child execution or forks can leak file descriptors, leading to resource exhaustion and eventual process denial of service if cleanup blocks are not systematically executed.
Denial of Service: A race condition where processes terminated early or via negative return codes (e.g., from signals) are not pruned from the active process list, causing memory leaks and zombie processes.