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CVE-2026-93488 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/errata/RHSA-2026:69440	[email protected]
https://access.redhat.com/errata/RHSA-2026:69470	[email protected]
https://access.redhat.com/errata/RHSA-2026:70257	[email protected]
https://access.redhat.com/security/cve/CVE-2026-93488	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2536887	[email protected]
https://github.com/netty/netty/releases/tag/netty-4.1.138.Final	[email protected]
https://github.com/netty/netty/releases/tag/netty-4.2.18.Final	[email protected]

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

5 change records found show changes

Date	Action	Recorded By
Sep 22, 2026	CVE Modified	[email protected]
Sep 21, 2026	CVE Modified	[email protected]
Sep 18, 2026	CVE Modified	[email protected]
Sep 18, 2026	CVE Modified	CISA-ADP
Sep 18, 2026	New CVE Received	[email protected]