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. From 0.1.1 until 0.5.4, the aarch64 implementations of Cmov and CmovEq in cmov/src/backends/aarch64.rs assume high bits are zero-extended when loading values smaller than a register, so set high bits such as [8..] in a Cmov selector or [16..] of self or other in the u16 and i16 CmovEq implementations can cause left.cmovz(&right, condition) to produce incorrect output. This issue is fixed in version 0.5.4.
CVSS Details
- CVSS 4.0 Base Score: 2 (LOW)
- CVSS 4.0 Vector: (CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 3.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade cargo-debuginfoUpgrade rust-std-static-wasm32-wasip1Upgrade rust-debugsourceUpgrade rust-analyzerUpgrade rustfmtUpgrade rust-toolsetUpgrade rust-debuginfoUpgrade rust-toolset-srpm-macrosUpgrade rust-gdbUpgrade rust-debugger-commonUpgrade cargoUpgrade clippyUpgrade rust-analyzer-debuginfoUpgrade rust-lldbUpgrade rust-srcUpgrade clippy-debuginfoUpgrade rust-std-staticUpgrade rustUpgrade rustfmt-debuginfoUpgrade rust-docUpgrade rust-std-static-wasm32-unknown-unknown | Aug 19, 2026 | Jul 17, 2026 |
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