{"id":"CVE-2026-23519","revision":"0dcd98bdb7af403482279c2b5a9f1ade","records":[{"revision":"0dcd98bdb7af403482279c2b5a9f1ade","observedAt":"2026-10-25T05:17:36.726+00:00","statement":{"source":"nvd","id":"CVE-2026-23519","aliases":[],"title":"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) co…","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":"2026-01-15T20:16:05.313+00:00","modifiedAt":"2026-06-17T10:21:42.97+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/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","score":8.9,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://github.com/RustCrypto/utils/commit/55977257e7c82a309d5e8abfdd380a774f0f9778","https://github.com/RustCrypto/utils/security/advisories/GHSA-2gqc-6j2q-83qp"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-23519","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-208","CWE-203"],"productCriteria":["cpe:2.3:a:rustcrypto:cmov:*:*:*:*:*:rust:*:*"],"sourceDates":{"published":"2026-01-15T20:16:05.313","lastModified":"2026-06-17T10:21:42.970"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-23519","identifiers":["CVE-2026-23519"]},"retained":false,"historicalAffected":[]}],"coverage":[]}