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CVE-2026-23519

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
RustCrypto / utilsaffected < 0.4.4

CWE

CWE-208

References

ADP enrichment

CISA-ADP

No English description supplied.