[cryptography] Secrets Hardening #2685
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patrick-ogrady
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Jan 3, 2026
patrick-ogrady
commented
- Add memfd_secret support on Linux 5.14+ with fallback to regular mmap
- Memory is unmapped from kernel direct mapping
- Cannot be read via /proc/pid/mem even by root
- Add MADV_DONTDUMP on Linux to prevent secrets in core dumps
- Add MADV_WIPEONFORK on Linux to zero memory in child processes after fork
- Update module documentation with security considerations
- Add test_wipeonfork (Linux) to verify fork protection
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- Add memfd_secret support on Linux 5.14+ with fallback to regular mmap - Memory is unmapped from kernel direct mapping - Cannot be read via /proc/pid/mem even by root - Add MADV_DONTDUMP on Linux to prevent secrets in core dumps - Add MADV_WIPEONFORK on Linux to zero memory in child processes after fork - Update module documentation with security considerations - Add test_wipeonfork (Linux) to verify fork protection 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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