CVE-2026-93488
A flaw was found in Netty. SpdySessionHandler accepts an unlimited number of concurrent remote-initiated streams because localConcurrentStreams defaults to Integer.MAX_VALUE and the handler provides no API to change it. A remote peer can open a SPDY connection and send a large number of SYN_STREAM frames with FLAG_FIN=0, causing unbounded heap and direct memory allocation that can lead to JVM OutOfMemoryError and a denial of service.
- Score
- CVSS 3.1 7.5 High
- Status
- Awaiting Analysis - secalert@redhat.com
- Published
- 2026-09-18
- Last modified
- 2026-10-15
- Weaknesses
- CWE-770
Affected products
- Amq Broker (Redhat)
- Amq Clients (Redhat)
- Apache Camel Quarkus (Redhat)
- Apicurio Registry (Redhat)
- Build Keycloak (Redhat)
- Camel Quarkus (Redhat)
- Camel Spring Boot (Redhat)
- Debezium (Redhat)
- Jboss Data Grid (Redhat)
- Jboss Enterprise Application Platform (Redhat)
- Jboss Fuse (Redhat)
- Quarkus (Redhat)
- Red Hat Single Sign On (Redhat)
References
- https://access.redhat.com/errata/RHSA-2026:69440
- https://access.redhat.com/errata/RHSA-2026:69470
- https://access.redhat.com/errata/RHSA-2026:70257
- https://access.redhat.com/errata/RHSA-2026:83612
- https://access.redhat.com/security/cve/CVE-2026-93488
- https://bugzilla.redhat.com/show_bug.cgi?id=2536887
- https://github.com/netty/netty/releases/tag/netty-4.1.138.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.18.Final
