CVE-2026-23519

The CVE-2026-23519 entry describes RustCrypto CMOV, which provides conditional move CPU intrinsics. The vulnerability concerns the thumbv6m-none-eabi target (Cortex-M0, M0+, M1) where the compiler emitted non-constant-time assembly for cmovnz prior to version 0.4.4. The issue affects how conditio...