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High Oracle Communications Signaling (Netty) CVEs

6 CVEs, 1 exploited

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Oracle product: Oracle Communications / Signaling (Netty)✕
Overview 6 matches · 0 protected · 1 exploited · 1 CISA KEV · 1 public PoC · 1 EPSS ≥ 0.5
6matches 0protected0.0% 1exploited16.7% 1CISA KEV16.7% 1public PoC16.7% 1EPSS ≥ 0.516.7%
Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 1 16.7% No exploit published 5 83.3%
Critical 0 0.0% High 6 100.0% Medium 0 0.0% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 6 100.0% not established 0 0.0% unrecorded 0 0.0%
Exploited 1 16.7% Working exploit published 0 0.0% Proof of concept only 3 50.0% Forecast only 0 0.0% No public exploit 2 33.3%
split by peak 4 / quarter
No exploit published: 5Mitigation candidate: 1 High: 6 not blocked: 6 No public exploit: 2Proof of concept only: 3Exploited: 1
Q4 231 Mitigation candidate1 High1 not blocked1 Exploited1 Q1 240 Q2 240 Q3 240 Q4 240 Q1 251 No exploit published1 High1 not blocked1 Proof of concept only1 Q2 250 Q3 250 Q4 250 Q1 260 Q2 260 Q3 264 No exploit published4 High4 not blocked4 Proof of concept only2 No public exploit2
Q4 23Q1 24Q2 24Q3 24Q4 24Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26
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CVE Severity Published▾ Status Exploitation Description
CVE-2026-56819 High 2026-07-21 No exploit published Proof of concept only Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, a remote unauthenticated peer can leak one direct `ByteBuf` per HTTP/2 `DATA` frame in applications that enable HTTP/2 content decompression via `DelegatingDecompressorFrameListener`. When a `DATA` frame is processed for a stream whose decompressor has already been closed, `Http2Decompressor.decompress(...)` calls `decompressor.writeInbound(data.retain())` and does not release the retained buffer on the error path, eventually exhausting direct memory and crashing the JVM. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
CVE-2026-56745 High 2026-07-21 No exploit published No public exploit Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
CVE-2026-55833 High 2026-07-21 No exploit published No public exploit 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 SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has exceeded `maxHeaderSize` and marked the frame truncated in `SpdyFrameCodec`, allowing a remote peer to send a small compressed `HEADERS` block that expands into much larger raw header data and causes compression-amplified CPU and allocation churn. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
CVE-2026-55831 High 2026-07-21 No exploit published Proof of concept only 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.
CVE-2025-24970 High 2025-02-10 No exploit published Proof of concept only Netty, an asynchronous, event-driven network application framework, has a vulnerability starting in version 4.1.91.Final and prior to version 4.1.118.Final. When a special crafted packet is received via SslHandler it doesn't correctly handle validation of such a packet in all cases which can lead to a native crash. Version 4.1.118.Final contains a patch. As workaround its possible to either disable the usage of the native SSLEngine or change the code manually.
CVE-2023-44487 High 2023-10-10 Mitigation candidate Exploited The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.