CVE-2026-50185

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Source
https://cve.org/CVERecord?id=CVE-2026-50185
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50185.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-50185
Aliases
Downstream
CGA (15)
DEBIAN (1)
MINI (6)
RHSA (1)
UBUNTU (1)
Published
2026-07-17T18:35:02Z
Modified
2026-10-28T02:30:28Z
Severity
  • 2.0 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
RustCrypto Cmov/CmovEq on aarch64 can produce wrong results if high-bits of registers are set
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(&right, condition) to produce incorrect output. This issue is fixed in version 0.5.4.

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"
}
References

Affected packages

Git / github.com/rustcrypto/utils

Affected ranges

Type
GIT
Repo
https://github.com/rustcrypto/utils
Events
Introduced
dfb4be5e2a0663e9c72dd1330871557d0bdd6384
Fixed
5c7e4f9bb31af81bf766360e836b6d633b84dbff
Fixed
dba6c355c9f241e3726d5ec2a68f9f3b519f6063
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:rustcrypto:cmov:*:*:*:*:*:rust:*:*",
            "range": [
                {
                    "introduced": "0.1.1"
                },
                {
                    "fixed": "0.5.4"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "dba6c355c9f241e3726d5ec2a68f9f3b519f6063"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "cmov-v0.5.4",
            "range": [
                {
                    "fixed": "5c7e4f9bb31af81bf766360e836b6d633b84dbff"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50185.json"