CVE-2022-2764

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

4.9 MediumFix available

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

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.90%Unchanged since Sep 2, 2022

What each source reports

NVD Score used 4.9

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

Record: CVE-2022-2764
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-02

CVE List No score

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

Record: CVE-2022-2764
Weakness: CWE-400
Updated: 2026-11-02

EUVDEUVD-2022-35006 No score

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

Record: EUVD-2022-35006
Updated: 2026-11-03

GitHub AdvisoriesGHSA-xpxq-cp94-87j2 4.9

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

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

Record: GHSA-xpxq-cp94-87j2
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2022-2764 4.9

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

Record: DEBIAN-CVE-2022-2764
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSVRHSA-2022:8790 4.2

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.8 Security update

Record: RHSA-2022:8790
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

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OSVRHSA-2022:8791 4.2

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.8 Security update

Record: RHSA-2022:8791
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2022:8792 4.2

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.8 Security update

Record: RHSA-2022:8792
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2023:1043 9.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 7

Record: RHSA-2023:1043
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2023:1044 9.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 8

Record: RHSA-2023:1044
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2023:1045 9.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 9

Record: RHSA-2023:1045
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2022-2764 4.9

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

Record: UBUNTU-CVE-2022-2764
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV No score

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

Record: CVE-2022-2764
Weakness: CWE-400
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`undertow` Debian:14	before 2.2.21-1, plus listed versions 1.3.11-11.3.16-11.3.19-11.3.21-11.3.23-1 Show 45 moreShow less 1.3.4-11.3.5-11.3.7-11.4.0-11.4.1-11.4.18-11.4.20-11.4.21-11.4.21-21.4.22-11.4.23-11.4.23-21.4.23-31.4.25-11.4.25-21.4.3-11.4.4-11.4.6-11.4.7-11.4.8-12.0.23-12.0.25-12.0.26-12.0.27-12.0.28-12.0.29-12.0.30-12.1.0-12.1.1-12.1.3-12.2.0-12.2.10-12.2.12-12.2.13-12.2.14-12.2.16-12.2.17-12.2.18-12.2.19-12.2.2-12.2.20-12.2.3-12.2.4-12.2.5-12.2.8-1	2.2.21-1
`eap7-undertow` Red Hat:jboss_enterprise_application_platform:7.4::el7	before 0:2.2.20-1.SP1_redhat_00001.1.el7eap	0:2.2.20-1.SP1_redhat_00001.1.el7eap
`eap7-undertow` Red Hat:jboss_enterprise_application_platform:7.4::el8	before 0:2.2.20-1.SP1_redhat_00001.1.el8eap	0:2.2.20-1.SP1_redhat_00001.1.el8eap
`eap7-undertow` Red Hat:jboss_enterprise_application_platform:7.4::el9	before 0:2.2.20-1.SP1_redhat_00001.1.el9eap	0:2.2.20-1.SP1_redhat_00001.1.el9eap
`rh-sso7-keycloak` Red Hat:red_hat_single_sign_on:7.6::el7 From an advisory covering 31 CVEs	before 0:18.0.6-1.redhat_00001.1.el7sso	0:18.0.6-1.redhat_00001.1.el7sso
`rh-sso7-keycloak-server` Red Hat:red_hat_single_sign_on:7.6::el7 From an advisory covering 31 CVEs	before 0:18.0.6-1.redhat_00001.1.el7sso	0:18.0.6-1.redhat_00001.1.el7sso
`rh-sso7-keycloak` Red Hat:red_hat_single_sign_on:7.6::el8 From an advisory covering 31 CVEs	before 0:18.0.6-1.redhat_00001.1.el8sso	0:18.0.6-1.redhat_00001.1.el8sso
`rh-sso7-keycloak-server` Red Hat:red_hat_single_sign_on:7.6::el8 From an advisory covering 31 CVEs	before 0:18.0.6-1.redhat_00001.1.el8sso	0:18.0.6-1.redhat_00001.1.el8sso
`rh-sso7-keycloak` Red Hat:red_hat_single_sign_on:7.6::el9 From an advisory covering 31 CVEs	before 0:18.0.6-1.redhat_00001.1.el9sso	0:18.0.6-1.redhat_00001.1.el9sso
`rh-sso7-keycloak-server` Red Hat:red_hat_single_sign_on:7.6::el9 From an advisory covering 31 CVEs	before 0:18.0.6-1.redhat_00001.1.el9sso	0:18.0.6-1.redhat_00001.1.el9sso

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Affected packages
Package	Affected	Fixed
`undertow` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 1.3.4-11.3.5-11.3.7-11.3.11-11.3.16-11.3.16-1ubuntu0.1~esm1	None known
`undertow` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.4.20-11.4.21-11.4.22-11.4.23-11.4.23-2build11.4.23-31.4.23-3ubuntu0.1~esm1	None known
`undertow` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 2.0.23-12.0.27-12.0.28-12.0.29-12.0.29-1ubuntu0.1~esm1	None known
`undertow` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 2.2.8-12.2.12-12.2.13-12.2.14-12.2.16-12.2.16-1ubuntu0.1~esm1	None known
`undertow` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 2.3.8-22.3.8-2ubuntu0.1~esm1	None known
`undertow` Ubuntu:25.10	All versions, plus listed versions 2.3.18-12.3.18-2	None known
`undertow` Ubuntu:26.10	All versions, plus listed versions 2.3.20-1ubuntu1	None known
`undertow` Ubuntu:26.04:LTS	All versions, plus listed versions 2.3.18-22.3.20-12.3.20-1ubuntu1	None known

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts	OSV
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-2764 is a medium vulnerability (CVSS 4.9) in Red Hat Undertow, published September 1, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.90%, the 59th percentile. Fixed in undertow 2.2.21-1.

References

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