CVE-2026-23519 - RustCrypto cmov: thumbv6m-none-eabi compiler emits non-constant time assembly when using cmovnz

CVE-2026-23519 - RustCrypto cmov: thumbv6m-none-eabi compiler emits non-constant time assembly when using cmovnz

https://cvefeed.io/rssfeed/latest.atom / Thu, 01/15/2026 - 22:57
CVE ID : CVE-2026-23519
Published : Jan. 15, 2026, 7:13 p.m. | 1 hour, 14 minutes ago
Description : RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time and not be rewritten as branches by the compiler. Prior to 0.4.4, the thumbv6m-none-eabi (Cortex M0, M0+ and M1) compiler emits non-constant time assembly when using cmovnz (portable version). This vulnerability is fixed in 0.4.4.
Severity: 0.0 | NA
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