3.3

CVE-2026-50185: rustcrypto cmov

CVSS: 3.3v3.1LowAnalyzed
AliasesDEBIAN-CVE-2026-50185CGA-4vv2-w86m-5j34CGA-7cv3-hwvc-4f36
Published 17-07-2026Last modified 20-07-2026
Open JSON

Vulnerability summary

CVE-2026-50185 is a low (CVSS 3.3) vulnerability in rustcrypto cmov. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
3.3/10
010
Low · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
RHSA-2026:42923CGA-3M4Q-6RQR-JXRW

Timeline

  1. 17-07-2026
    PublishedVulnerability first disclosed.
  2. 20-07-2026
    Last modifiedVulnerability information updated.

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. 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.

CVSS metrics

9 scores · 7 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Utils

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard7 products
  • apollo-router-2< 2.16.0-r2
  • deno< 2.9.1-r1
  • komodo-core< 2.2.0-r5
  • komodo-periphery< 2.2.0-r5
  • mountpoint-s3< 1.22.3-r5
Wolfi4 products
  • deno< 2.9.1-r1
  • mountpoint-s3< 1.22.3-r5
  • pixi< 0.81.0-r0 | < 0.72.0-r1
  • yazi< 26.5.6-r5
Rustcrypto2 products
  • cmov≥ 0.1.1, < 0.5.4
  • utils≥ 0.1.1, < 0.5.4
Crates.Io1 product
  • cmov≥ 0.1.1, < 0.5.4
Debian1 product
  • rust-cmov< 0.5.4-1
Ubuntu1 product
  • rust-cmovAll versions (No fix recorded)

6 vendors · 16 products

References

9 links