UBUNTU-CVE-2026-50185

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Source
https://ubuntu.com/security/CVE-2026-50185
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50185.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-50185
Upstream
Published
2026-07-17T19:17:00Z
Modified
2026-10-17T12:58:32Z
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
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:26.10 / rust-cmov

Package

Name
rust-cmov
Purl
pkg:deb/ubuntu/rust-cmov?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.5.3-1
0.5.4-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "librust-cmov-dev",
            "binary_version":  "0.5.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50185.json"