Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length limit and materializes every unique setting ID in `DefaultSpdySettingsFrame`, allowing a remote SPDY/3.1 peer to send a syntactically valid roughly 2 MiB SETTINGS frame that creates 262144 map entries and amplifies network input into heap growth and ordered-map insertion work. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Metrics
Affected Vendors & Products
References
History
Thu, 23 Jul 2026 15:30:00 +0000
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ssvc
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Wed, 22 Jul 2026 00:45:00 +0000
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Netty
Netty netty |
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Netty
Netty netty |
Mon, 20 Jul 2026 23:30:00 +0000
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| Description | Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length limit and materializes every unique setting ID in `DefaultSpdySettingsFrame`, allowing a remote SPDY/3.1 peer to send a syntactically valid roughly 2 MiB SETTINGS frame that creates 262144 map entries and amplifies network input into heap growth and ordered-map insertion work. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. | |
| Title | Netty SPDY SETTINGS frame count materializes unbounded settings map | |
| Weaknesses | CWE-400 CWE-770 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-07-20T23:00:31.859Z
Updated: 2026-07-23T14:33:27.925Z
Reserved: 2026-06-17T16:29:38.864Z
Link: CVE-2026-55831
Updated: 2026-07-23T14:33:14.087Z
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