{"id":"CVE-2026-50185","revision":"4608ae78e7a64593b86e1e1b9ebb28c8","records":[{"revision":"4608ae78e7a64593b86e1e1b9ebb28c8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-50185","aliases":[],"title":"RustCrypto Cmov/CmovEq on aarch64 can produce wrong results if high-bits of registers are set","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.","state":0,"publishedAt":"2026-07-17T18:35:02.078+00:00","modifiedAt":"2026-07-20T19:24:54.587+00:00","affected":[{"ecosystem":"Vendor product","name":"utils","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"RustCrypto\",\n                    \"product\": \"utils\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.1.1, < 0.5.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"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","score":2,"severity":"LOW"}],"references":["https://github.com/RustCrypto/utils/security/advisories/GHSA-3rjw-m598-pq24","https://github.com/RustCrypto/utils/commit/dba6c355c9f241e3726d5ec2a68f9f3b519f6063","https://github.com/RustCrypto/utils/releases/tag/cmov-v0.5.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50185","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-50185","identifiers":["CVE-2026-50185"]},"retained":false,"historicalAffected":[]}],"coverage":[]}