Security researcher Jakub Ciolek discovered two compiler bugs in Go versions up to 1.26.1 that break memory safety guarantees using only safe Go code, enabling control-flow hijacking and arbitrary code execution. The vulnerabilities were found in the compiler's prove optimization pass and loop bound check elimination logic. This demonstrates that memory safety depends on the entire toolchain, not just the language semantics.
Background
Go language promises memory safety through its type system and runtime checks, but compiler implementation bugs can undermine these guarantees. The prove pass is a key optimization component that eliminates redundant bounds checks based on static analysis.
- Source
- Lobsters
- Published
- Apr 8, 2026 at 07:35 AM
- Score
- 8.0 / 10