{"id":"CVE-2026-23519","revision":"a3a19f3adb88446f8e28758b20a7fd91","records":[{"revision":"a3a19f3adb88446f8e28758b20a7fd91","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23519","aliases":[],"title":"RustCrypto cmov: thumbv6m-none-eabi compiler emits non-constant time assembly when using cmovnz","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.","state":0,"publishedAt":"2026-01-15T19:13:54.44+00:00","modifiedAt":"2026-01-15T19:57:48.741+00:00","affected":[{"ecosystem":"Vendor product","name":"utils","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"RustCrypto\",\n                    \"product\": \"utils\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.4.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","score":8.9,"severity":"HIGH"}],"references":["https://github.com/RustCrypto/utils/security/advisories/GHSA-2gqc-6j2q-83qp","https://github.com/RustCrypto/utils/commit/55977257e7c82a309d5e8abfdd380a774f0f9778"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23519","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23519","identifiers":["CVE-2026-23519"]},"retained":false,"historicalAffected":[]}],"coverage":[]}