High severity7.5NVD Advisory· Published Aug 23, 2022· Updated Jun 17, 2026
CVE-2021-3690
CVE-2021-3690
Description
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
io.undertow:undertow-coreMaven | < 2.0.40 | 2.0.40 |
io.undertow:undertow-coreMaven | >= 2.2.0, < 2.2.10 | 2.2.10 |
Affected products
11- Undertow/Undertowdescription
- cpe:2.3:a:redhat:integration_camel_k:-:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:integration_camel_quarkus:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:*+ 2 more
- cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:*
- cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_application_runtimes:-:*:*:*:text-only:*:*:*
- cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
Patches
Vulnerability mechanics
References
8- github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877nvdPatchThird Party AdvisoryWEB
- issues.redhat.com/browse/UNDERTOW-1935nvdExploitIssue TrackingMitigationVendor AdvisoryWEB
- access.redhat.com/security/cve/CVE-2021-3690nvdVendor AdvisoryWEB
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor AdvisoryWEB
- github.com/advisories/GHSA-fj7c-vg2v-ccrmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-3690ghsaADVISORY
- access.redhat.com/security/cve/cve-2021-3690ghsaWEB
- www.mend.io/vulnerability-database/CVE-2021-3690ghsaWEB
News mentions
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