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Fencer Vulns
medium 5.9

CVE-2022-50237 json

`ed25519-dalek` Double Public Key Signing Function Oracle Attack

published 2022-06-11 4 y ago modified 2026-06-17 4 mo ago also GHSA-w5vr-6qhr-36cc , RUSTSEC-2022-0093 , EUVD-2022-55212

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

The ed25519-dalek crate before 2 for Rust allows a double public key signing function oracle attack. The Keypair implementation leads to a simple computation for extracting a private key.

Patch / fix

  • crates.io ed25519-dalek 2.0.0
  • dalek-cryptography ed25519-dalek 2
  • pijul openSUSE Tumbleweed 1.0.0~beta.23-1.1

opensuse advisories openSUSE-SU-2026:11838-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-50237 updated cvss 5.9

ed25519-dalek: ed25519-dalek: Private Key Extraction Vulnerability

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/vector-rhel9, openshift-logging/eventrouter-rhel9, openshift-logging/cluster-logging-rhel9-operator, openshift-logging/log-file-metric-exporter-rhel9, openshift-logging/cluster-logging-operator-bundle Red Hat Enterprise Linux 9 trustee-guest-components Red Hat Enterprise Linux 10 rust-sequoia-sq, rust-sequoia-sqv, trustee-guest-components Red Hat OpenShift Container Platform 4 kata-containers Red Hat Trusted Artifact Signer rhtas/tuffer-rhel9, rhtas/tuftool-rhel9 Red Hat Trusted Profile Analyzer rhtpa/rhtpa-trustification-service-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
GitHub 3.1 5.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
crates.io ed25519-dalek
<2.0.0
>=0.0.0-0, <2.0.0
2.0.0

Affected products

  • dalek-cryptography ed25519-dalek

Classification

Weakness
  • CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.