# CVE-2026-33870: netty: This update for netty, netty-tcnative fixes the following issues:  Upidate to 4.1.132:  - CVE-2026-33870: incorrectly...

CVE-2026-33870 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:1353-1, released April 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-33870
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0070
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 15, 2026

## Description

This update for netty, netty-tcnative fixes the following issues:  Upidate to 4.1.132:  - CVE-2026-33870: incorrectly parses quoted strings in HTTP/1.1 can lead to request smuggling (bsc#1261031). - CVE-2026-33871: sending a flood of CONTINUATION frames can lead to a denial of service (bsc#1261043).  Changelog:  - Upgrade to upstream version 4.1.132  * Fixes:  + Fix Incorrect nanos-to-millis conversion in epoll_wait EINTR  retry loop  + Make RefCntOpenSslContext.deallocate more robust  + HTTP2: Correctly account for padding when decompress  + Fix high-order bit aliasing in HttpUtil.validateToken  + fix: the precedence of + is higher than >>  + AdaptiveByteBufAllocator: make sure byteBuf.capacity() not  greater than byteBuf.maxCapacity()  + AdaptivePoolingAllocator: call unreserveMatchingBuddy(...)  if byteBuf initialization failed  + Don't assume CertificateFactory is thread-safe  + Fix HttpObjectAggregator leaving connection stuck after 413  with AUTO_READ=false  + HTTP2: Ensure preface is flushed in all cases  + Fix UnsupportedOperationException in readTrailingHeaders  + Fix client_max_window_bits parameter handling in  permessage-deflate extension  + Native transports: Fix possible fd leak when fcntl fails.  + Kqueue: Fix undefined behaviour when GetStringUTFChars fails  and SO_ACCEPTFILTER is supported  + Kqueue: Possible overflow when using  netty_kqueue_bsdsocket_setAcceptFilter(...)  + Native transports: Fix undefined behaviour when  GetStringUTFChars fails while open FD  + Epoll: Add null checks for safety reasons  + Epoll: Use correct value to initialize mmsghdr.msg_namelen  + Epoll: Fix support for IP_RECVORIGDSTADDR  + AdaptivePoolingAllocator: remove ensureAccessible() call in  capacity(int) method  + Epoll: setTcpMg5Sig(...) might overflow  + JdkZlibDecoder: accumulate decompressed output before firing  channelRead  + Limit the number of Continuation frames per HTTP2 Headers  (bsc#1261043, CVE-2026-33871)  + Stricter HTTP/1.1 chunk extension parsing (bsc#1261031,  CVE-2026-33870)  + rediff - Upgrade to upstream version 4.1.131  + NioDatagramChannel.block(...) does not early return on failure  + Support for AWS Libcrypto (AWS-LC) netty-tcnative build  + codec-dns: Decompress MX RDATA exchange domain names during  DNS record decoding  + Buddy allocation for large buffers in adaptive allocator  + SslHandler: Only resume on EventLoop if EventLoop is not  shutting down already  + Wrap ECONNREFUSED in PortUnreachableException for UDP  + Bump com.ning:compress-lzf (4.1)  + Fix adaptive allocator bug from not noticing failed allocation  + Avoid loosing original read exception  + Backport multiple adaptive allocator changes - Upgrade to version 4.1.130 - Upgrade to version 2.0.75 Final  * No formal changelog present  * Needed by netty >= 4.2.11

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | netty opensuse-leap 15.6 | 4.1.132-150200.4.43.1 | [SUSE-SU-2026:1353-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1353-1.md) | Apr 15, 2026 |
| Linux | netty sles 15.7 | 4.1.132-150200.4.43.1 | [SUSE-SU-2026:1353-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1353-1.md) | Apr 15, 2026 |
| Linux | netty-tcnative opensuse-leap 15.6 | 2.0.75-150200.3.36.1 | [SUSE-SU-2026:1353-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1353-1.md) | Apr 15, 2026 |
| Linux | netty-tcnative sles 15.7 | 2.0.75-150200.3.36.1 | [SUSE-SU-2026:1353-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1353-1.md) | Apr 15, 2026 |

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Data as of 2026-11-10T07:50:38Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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