Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- 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
FAQ
What is CVE-2026-93488?
CVE-2026-93488 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 n...
How severe is CVE-2026-93488?
CVE-2026-93488 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-93488?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.