# CVE-2026-50185: rust-cmov: RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in consta... CVE-2026-50185 is fixed in 23 products on 1 platform, first by DEBIAN-CVE-2026-50185, released July 19, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-50185 - Priority: Routine - CVSS: 3.3 (low) - EPSS: 0.0016 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 17, 2026 ## 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. 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | amazon-efs-utils amzn 2023 | 3.3.2-1.amzn2023 | [ALAS2023-2026-3132](https://patchblox.com/security/data/fix/linux/alas2023-2026-3132.md) | Sep 28, 2026 | | Linux | cargo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | cargo-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | clippy amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | clippy-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-analyzer amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-analyzer-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-cmov Debian 14 | 0.5.4-1 | [DEBIAN-CVE-2026-50185](https://patchblox.com/security/data/fix/linux/debian-cve-2026-50185.md) | Jul 19, 2026 | | Linux | rust-debugger-common amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-debugsource amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-doc amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-gdb amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-lldb amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-src amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-std-static amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-std-static-wasm32-unknown-unknown amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-std-static-wasm32-wasip1 amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-toolset amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-toolset-srpm-macros amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rustfmt amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rustfmt-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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