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Fencer Vulns
medium 4.9

CVE-2022-2764 json

A flaw was found in Undertow.

published 2022-09-01 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-35006

cvss
4.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

A flaw was found in Undertow. Denial of service can be achieved as Undertow server waits for the LAST_CHUNK forever for EJB invocations.

Patch / fix

  • undertow Debian 14 2.2.21-1

debian advisories DEBIAN-CVE-2022-2764

  • rh-sso7-keycloak red hat single sign on 7.6 18.0.6-1.redhat_00001.1.el7sso
  • rh-sso7-keycloak-server red hat single sign on 7.6 18.0.6-1.redhat_00001.1.el7sso
  • rh-sso7-keycloak red hat single sign on 7.6 18.0.6-1.redhat_00001.1.el8sso
  • rh-sso7-keycloak-server red hat single sign on 7.6 18.0.6-1.redhat_00001.1.el8sso
  • rh-sso7-keycloak red hat single sign on 7.6 18.0.6-1.redhat_00001.1.el9sso
  • rh-sso7-keycloak-server red hat single sign on 7.6 18.0.6-1.redhat_00001.1.el9sso
  • eap7-undertow jboss enterprise application platform 7.4 2.2.20-1.SP1_redhat_00001.1.el9eap
  • eap7-undertow jboss enterprise application platform 7.4 2.2.20-1.SP1_redhat_00001.1.el7eap

red hat advisories RHSA-2023:1043RHSA-2023:1044RHSA-2023:1045RHSA-2022:8792RHSA-2022:8790RHSA-2022:8791

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-2022-2764 updated cvss 4.2

Undertow: DoS can be achieved as Undertow server waits for the LAST_CHUNK forever for EJB invocations

  • Red Hat Data Grid 8 undertow undertow Red Hat Fuse 7 undertow undertow Red Hat Integration Camel K 1 undertow undertow Red Hat Integration Camel Quarkus 1 undertow undertow
    affected: no fix available “Fix deferred”
  • Red Hat JBoss Data Grid 7 undertow undertow Red Hat JBoss Fuse 6 undertow undertow Red Hat OpenStack Platform 13 (Queens) undertow
    affected: no fix planned “Out of support scope”
  • Red Hat Middleware Containers for OpenShift rh-sso-7/sso76-openshift-rhel8 7.6-20
    fixed: vendor fix RHSA-2023:1047
  • Red Hat JBoss EAP 7.4 for RHEL 7 Server eap7-undertow 2.2.20-1.SP1_redhat_00001.1.el7eap
    fixed: vendor fix RHSA-2022:8790
  • Red Hat JBoss EAP 7.4 for RHEL 8 eap7-undertow 2.2.20-1.SP1_redhat_00001.1.el8eap
    fixed: vendor fix RHSA-2022:8791
  • Red Hat JBoss EAP 7.4 for RHEL 9 eap7-undertow 2.2.20-1.SP1_redhat_00001.1.el9eap
    fixed: vendor fix RHSA-2022:8792
  • Red Hat JBoss Enterprise Application Platform undertow-core 2.2.20.SP1-redhat-00001
    fixed: vendor fix RHSA-2022:8793
  • Red Hat Single Sign-On 7
    fixed: vendor fix RHSA-2023:1049
show 4 more
  • Red Hat Single Sign-On 7.6 for RHEL 7 Server rh-sso7-keycloak 18.0.6-1.redhat_00001.1.el7sso, rh-sso7-keycloak-server 18.0.6-1.redhat_00001.1.el7sso
    fixed: vendor fix RHSA-2023:1043
  • Red Hat Single Sign-On 7.6 for RHEL 8 rh-sso7-keycloak 18.0.6-1.redhat_00001.1.el8sso, rh-sso7-keycloak-server 18.0.6-1.redhat_00001.1.el8sso
    fixed: vendor fix RHSA-2023:1044
  • Red Hat Single Sign-On 7.6 for RHEL 9 rh-sso7-keycloak 18.0.6-1.redhat_00001.1.el9sso, rh-sso7-keycloak-server 18.0.6-1.redhat_00001.1.el9sso
    fixed: vendor fix RHSA-2023:1045
  • Red Hat build of Quarkus undertow undertow, quarkus-http quarkus-http Red Hat Decision Manager 7 undertow undertow Red Hat Integration Service Registry undertow undertow Red Hat JBoss EAP 7.4 for RHEL 7 Server eap7-wildfly 7.4.8-4.GA_redhat_00002.1.el7eap, eap7-glassfish-javamail 1.6.7-1.redhat_00001.1.el7eap, eap7-hal-console 3.3.15-1.Final_redhat_00001.1.el7eap, eap7-infinispan 11.0.16-1.Final_redhat_00001.1.el7eap, eap7-wildfly-modules 7.4.8-4.GA_redhat_00002.1.el7eap, eap7-glassfish-jsf 2.3.14-6.SP07_redhat_00001.1.el7eap, +19 more Red Hat JBoss EAP 7.4 for RHEL 8 eap7-wildfly 7.4.8-4.GA_redhat_00002.1.el8eap, eap7-glassfish-javamail 1.6.7-1.redhat_00001.1.el8eap, eap7-hal-console 3.3.15-1.Final_redhat_00001.1.el8eap, eap7-infinispan 11.0.16-1.Final_redhat_00001.1.el8eap, eap7-wildfly-modules 7.4.8-4.GA_redhat_00002.1.el8eap, eap7-glassfish-jsf 2.3.14-6.SP07_redhat_00001.1.el8eap, +17 more Red Hat JBoss EAP 7.4 for RHEL 9 eap7-wildfly 7.4.8-4.GA_redhat_00002.1.el9eap, eap7-glassfish-javamail 1.6.7-1.redhat_00001.1.el9eap, eap7-hal-console 3.3.15-1.Final_redhat_00001.1.el9eap, eap7-infinispan 11.0.16-1.Final_redhat_00001.1.el9eap, eap7-wildfly-modules 7.4.8-4.GA_redhat_00002.1.el9eap, eap7-glassfish-jsf 2.3.14-6.SP07_redhat_00001.1.el9eap, +17 more
    +3 more products
    Red Hat JBoss Enterprise Application Platform pom.xml, c3 0.6.0, c3 0.7.1, d3 5.9.2, ms 2.0.0, ms 2.1.2, +1487 more Red Hat Process Automation 7 undertow undertow Red Hat support for Spring Boot undertow undertow
    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

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

  • n/a undertow

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.