CVE-2026-93488
highA flaw was found in Netty.
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
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-09-18 12:17
Modified: 2026-10-15 17:17
NVD status: Awaiting Analysis
Last synced 2 days ago
Verified against the source API 2026-10-27 06:54 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2026:69440 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:69470 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:70257 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:83612 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-93488 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2536887 secalert@redhat.com
- https://github.com/netty/netty/releases/tag/netty-4.1.138.Final secalert@redhat.com
- https://github.com/netty/netty/releases/tag/netty-4.2.18.Final secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:54 UTC · record ↗