Answer in brief
CVE-2024-1635 records a High severity (CVSS 7.5) vulnerability in Undertow: out-of-memory error after several closed connections with wildfly-http-client protocol. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2024-1635 records a High severity (CVSS 7.5) vulnerability in Undertow: out-of-memory error after several closed connections with wildfly-http-client protocol. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
Affected software not mapped in the current feed; confirm the named product and version against your inventory.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:* | Not reported | Not reported |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | Not reported | Not reported |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* | Not reported | Not reported |
| cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:integration_camel_for_spring_boot:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform:4.11:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform:4.12:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.10:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.9:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_power:4.10:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_power:4.9:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* | Not reported | Not reported |
Published upstream
Feb 19, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. Whenever a malicious user opens and closes a connection with the HTTP port of the server and then closes the connection immediately, the server will end with both memory and open file limits exhausted at some point, depending on the amount of memory available. At HTTP upgrade to remoting, the WriteTimeoutStreamSinkConduit leaks connections if RemotingConnection is closed by Remoting ServerConnectionOpenListener. Because the remoting connection originates in Undertow as part of the HTTP upgrade, there is an external layer to the remoting connection. This connection is unaware of the outermost layer when closing the connection during the connection opening procedure. Hence, the Undertow WriteTimeoutStreamSinkConduit is not notified of the closed connection in this scenario. Because WriteTimeoutStreamSinkConduit creates a timeout task, the whole dependency tree leaks via that task, which is added to XNIO WorkerThread. So, the workerThread points to the Undertow conduit, which contains the connections and causes the leak.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
Affected software not mapped in the current feed; confirm the named product and version against your inventory.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:* | Not reported | Not reported |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | Not reported | Not reported |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* | Not reported | Not reported |
| cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:integration_camel_for_spring_boot:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform:4.11:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform:4.12:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.10:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.9:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_power:4.10:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:openshift_container_platform_for_power:4.9:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* | Not reported | Not reported |
Published upstream
Feb 19, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. Whenever a malicious user opens and closes a connection with the HTTP port of the server and then closes the connection immediately, the server will end with both memory and open file limits exhausted at some point, depending on the amount of memory available. At HTTP upgrade to remoting, the WriteTimeoutStreamSinkConduit leaks connections if RemotingConnection is closed by Remoting ServerConnectionOpenListener. Because the remoting connection originates in Undertow as part of the HTTP upgrade, there is an external layer to the remoting connection. This connection is unaware of the outermost layer when closing the connection during the connection opening procedure. Hence, the Undertow WriteTimeoutStreamSinkConduit is not notified of the closed connection in this scenario. Because WriteTimeoutStreamSinkConduit creates a timeout task, the whole dependency tree leaks via that task, which is added to XNIO WorkerThread. So, the workerThread points to the Undertow conduit, which contains the connections and causes the leak.
Quoted source text, attributed separately from HOL analysis.