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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| RustCrypto | utils | < 0.4.4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | yazi | 26.1.4-r2 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| crates.io | cmov | < 0.4.4 | 0.4.4 | GHSA-2gqc-6j2q-83qp |
| crates.io | cmov | >= 0.0.0-0, < 0.4.4 | 0.4.4 | RUSTSEC-2026-0003 |