{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:rustcrypto:cmov:*:*:*:*:*:rust:*:*",
            "extracted_events": [
              {
                "introduced": "0.1.1"
              },
              {
                "fixed": "0.5.4"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "dfb4be5e2a0663e9c72dd1330871557d0bdd6384"
            },
            {
              "fixed": "5c7e4f9bb31af81bf766360e836b6d633b84dbff"
            },
            {
              "fixed": "dba6c355c9f241e3726d5ec2a68f9f3b519f6063"
            }
          ],
          "repo": "https://github.com/rustcrypto/utils",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3rjw-m598-pq24"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-758"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50185.json"
  },
  "details": "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(\u0026right, condition) to produce incorrect output. This issue is fixed in version 0.5.4.",
  "id": "CVE-2026-50185",
  "modified": "2026-08-20T03:30:11.690573516Z",
  "published": "2026-07-17T18:35:02.078Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/RustCrypto/utils/releases/tag/cmov-v0.5.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50185.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/RustCrypto/utils/security/advisories/GHSA-3rjw-m598-pq24"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50185"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RustCrypto/utils/commit/dba6c355c9f241e3726d5ec2a68f9f3b519f6063"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RustCrypto Cmov/CmovEq on aarch64 can produce wrong results if high-bits of registers are set"
}