netty/netty netty-4.2.11.Final on GitHub

Security

CVE-2026-33871, HTTP/2 CONTINUATION Frame Flood Denial of Service
CVE-2026-33870, HTTP Request Smuggling via Chunked Extension Quoted-String Parsing

What's Changed

Update to latest JDK 26 EA release by @normanmaurer in #16230
HTTP3: Allow to support non-standard HTTP3 settings by @normanmaurer in #16171
Fix Incorrect nanos-to-millis conversion in epoll_wait EINTR retry loop by @adwsingh in #16245
Allocate one large segment and slice for each MsgHdrMemory by @dreamlike-ocean in #16234
Make RefCntOpenSslContext.deallocate more robust by @chrisvest in #16253
Epoll: Fix excessive CPU usage when Channel is only registered but no… by @normanmaurer in #16250
Update to gcc for arm 10.3-2021.07 by @m1ngyuan in #16255
Add acmeIdentifier extension support to pkitesting by @chrisvest in #16256
Update JDK versions to latest patch releases by @m1ngyuan in #16254
Avoid allocation in HttpObjectEncoder.addEncodedLengthHex method by @doom369 in #16241
Automatic backporting workflow from 4.1 to 4.2 by @chrisvest in #16269
Revert "Automatic backporting workflow from 4.1 to 4.2" by @chrisvest in #16270
HTTP2: Correctly account for padding when decompress by @normanmaurer in #16264
Automatic backporting workflow from 4.1 to 4.2 by @chrisvest in #16271
Automatic backporting workflow from 4.1 to 4.2 by @chrisvest in #16273
Backport PRs must be created with personal access tokens by @chrisvest in #16276
Expose QuicSslContextBuilder::sni by @ZeroErrors in #16178
Add more porting workflows by @chrisvest in #16275
Add more porting workflows by @chrisvest in #16283
Remove the unpooled allocator from test permutations by @chrisvest in #16282
Some polishing of the porting workflows by @chrisvest in #16288
Allow to set destination connection id when creating a client side QuicheChannel by @normanmaurer in #16286
Update to latest JDK26 EA build by @normanmaurer in #16295
Add javadoc to clarify responsibility of the user when generating the remote connection id by @normanmaurer in #16293
Make the build run faster by @chrisvest in #16290
Fix IDE warnings in SslHandler by @doom369 in #16237
Decrease Long allocations and map.put calls in ReferenceCountedOpenSllEngine in handshake() method by @doom369 in #16242
Support boringssl SSLCredential API by @jmcrawford45 in #15919
Fix high-order bit aliasing in HttpUtil.validateToken by @furkanvarol in #16279
Improve multi-byte access performance when UNALIGNED availability is unknown by @Songdoeon in #16207
Avoid unnecessary SSL.getVersion() call and string allocation in ReferenceCountedOpenSslEngine by @doom369 in #16278
Support more branch freedom for auto-porting by @chrisvest in #16300
fix: the precedence of + is higher than >> by @cuiweixie in #16312
AdaptiveByteBufAllocator: make sure byteBuf.capacity() not greater than byteBuf.maxCapacity() by @laosijikaichele in #16309
Fix flaky PooledByteBufAllocatorTest by @chrisvest in #16313
Fix pooled arena accounting tests by @chrisvest in #16321
Fix RunInFastThreadLocalThreadExtension by @chrisvest in #16314
AdaptivePoolingAllocator: call unreserveMatchingBuddy(...) if byteBuf initialization failed by @laosijikaichele in #16327
Recycler should not use thread locals unless they get cleaned up by @chrisvest in #16315
OpenSSL: Don't leak OpenSslKeyManagerProvider on exception by @normanmaurer in #16337
IoUring: Only complete deregistration promise once we received all co… by @normanmaurer in #16330
Mark LoggingHandlerTest with @isolated to fix flaky build by @normanmaurer in #16338
Fix flaky HTTP/2 test by @chrisvest in #16342
Fix HTTP/2 push frame test by @chrisvest in #16343
Fix flaky RenegotiateTest by @chrisvest in #16351
IoUring: Don't use RDHUP for non stream Channel implementations by @normanmaurer in #16345
SSL test: Don't depend on property value in test by @normanmaurer in #16346
Fix flaky AbstractSingleThreadEventLoopTest by @chrisvest in #16352
Use headers.setInt() in HttpObjectAggregator instead of set() and use concrete version of String.valueOf in CharSequenceValueConverter by @doom369 in #16239
IoUring: Fix buffer leak in DatagramChannel implementation when recv … by @normanmaurer in #16359
Don't assume CertificateFactory is thread-safe by @chrisvest in #16350
AdaptivePoolingAllocator: assign a more explicit value to BuddyChunk.freeListCapacity by @laosijikaichele in #16334
Fix leak in SniHandlerTest by @chrisvest in #16367
Add more diagnostic points to PooledByteBufAllocatorTest.createNewThr… by @chrisvest in #16365
Stabilize AbstractByteBufTest.testBytesInArrayMultipleThreads by @chrisvest in #16370
Avoid unnecessary Long.toString() allocation in HttpObjectDecoder by @doom369 in #16344
Remove reference counting from size classed chunks by @franz1981 in #16306
Stabilize AbstractByteBufTest.testToStringMultipleThreads by @chrisvest in #16380
Swap conditions to avoid native calls in ReferenceCountedOpenSslEngine.rejectRemoteInitiatedRenegotiation by @doom369 in #16389
Remove duplicated contains calls in WebSockets by @doom369 in #16388
IoUring: Reduce unnecessary io_uring_enter syscalls on non-blocking path by @dreamlike-ocean in #16259
Fix NioIoHandlerTest on macOS by @chrisvest in #16396
LocalChannel: Remove dependency on SingleThreadEventExecutor by @normanmaurer in #16393
Fix autoport fetching into the existing branch by @chrisvest in #16403
HTTP2: Pass the correct number of arguments when logging goaway by @normanmaurer in #16392
Revert "Fix autoport fetching into the existing branch" by @chrisvest in #16410
Fix HttpObjectAggregator leaving connection stuck after 413 with AUTO (#16280) by @chrisvest in #16401
Fix autoport fetching into the existing branch - again by @chrisvest in #16411
Fix typo in AbstractEpollChannel: 'inital' → 'initial' by @nikitanagar08 in #16415
Capture why threads get stuck in testCopyMultipleThreads0 by @chrisvest in #16404
Local transport: shutdown hook should call closeNow to be conistent with what LocalIoHandler will call by @normanmaurer in #16406
Remove unnecessary array access in DefaultAttributeMap.orderedCopyOnInsert by @doom369 in #16386
Whitelist JMH annotation processing in microbench module by @laosijikaichele in #16428
Fire the QuicChannel datagram extension event before the channel becomes active by @vietj in #16425
HTTP2: Ensure preface is flushed in all cases by @normanmaurer in #16407
Support QuicheQuicSslEngine hostname identification algorithm. by @vietj in #16426
Fix client_max_window_bits parameter handling in permessage-deflate extension by @nikitanagar08 in #16424
Fix UnsupportedOperationException in readTrailingHeaders by @furkanvarol in #16412
IoUring: Fix io_uring writev infinite loop on kernels without SENDMSG_ZC support by @dreamlike-ocean in #16438
Kqueue: Correctly handle registrations by @normanmaurer in #16439
Kqueue: Correctly use KqueueIoOps.data() when update change list by @normanmaurer in #16440
Native transports: Fix possible fd leak when fcntl fails. by @normanmaurer in #16442
Kqueue: Fix undefined behaviour when GetStringUTFChars fails and SO_ACCEPTFILTER is supported by @normanmaurer in #16441
AbstractByteBuf._internalNioBuffer() might throw exception by @normanmaurer in #16423
Native transports: Fix undefined behaviour when GetStringUTFChars fails while open FD by @normanmaurer in #16450
Kqueue: Possible overflow when using netty_kqueue_bsdsocket_setAcceptFilter(...) by @normanmaurer in #16451
Epoll: Add null checks for safety reasons by @normanmaurer in #16454
DnsNameResolver: Skip test if we can not bind TCP and UDP to the same port by @normanmaurer in #16455
Epoll: Use correct value to initialize mmsghdr.msg_namelen by @normanmaurer in #16460
Epoll: Fix support for IP_RECVORIGDSTADDR by @normanmaurer in #16461
Make unpooled buffers avoid shared arenas by @chrisvest in #16443
Kqueue: Add testsuite on macOS during PR validation by @normanmaurer in #15159
AdaptivePoolingAllocator: remove ensureAccessible() call in capacity(int) method by @laosijikaichele in #16473
Epoll: Remove outdated docs about usage of edge-triggered by @normanmaurer in #16478
IoUring: Correctly unregister native functions on OnLoad failure by @normanmaurer in #16487
QUIC: Correctly handle selection of alpn protos by @normanmaurer in #16484
QUIC: Correctly handle malloc errors during ssl context creation by @normanmaurer in #16483
QUIC: Don'l leak memory when context is detroyed by @normanmaurer in #16481
Quic: Fix global reference leak by @normanmaurer in #16480
Log value of io.netty.ignoreExpensiveClean property during initialization by @normanmaurer in #16479
Cleanup: Fix typo in method name by @normanmaurer in #16477
AdaptivePoolingAllocator: Fix assertion for size class multiple of 32 by @laosijikaichele in #16474
ByteBufAllocatorAllocPatternBenchmark: Fix case sensitivity in benchmark method name check by @laosijikaichele in #16482
Avoid unpooled allocator in CloseWebSocketFrame by @Munoon in #16486
IoUring: Correctly handle the case when malloc fails during probe by @normanmaurer in #16501
IoUring: Correctly unload native stuff by @normanmaurer in #16502
IoUring: Use correct errno value in exception by @normanmaurer in #16500
IoUring: Use more correct bitmask check by @normanmaurer in #16507
IoUring: Correctly handle return value of sys_io_uring_register(...) while register und unregister buffer ring by @normanmaurer in #16508
IoUring: Add NULL check for GetStringUTFChars(...) by @normanmaurer in #16509
Reduce allocations in WebSocketServerHandshaker13 by @doom369 in #16505
Epoll / IoUring: setTcpMg5Sig(...) might overflow by @normanmaurer in #16511
Fix docker image for cross-compiling by @normanmaurer in #16522
Replace ClosedChannelException with StacklessClosedChannelException by @Munoon in #16506
Allocate less in QueryStringDecoder.addParam for typical use case by @doom369 in #16527
Enforce io.netty.maxDirectMemory accounting on all Java versions by @j-bahr in #16489
JdkZlibDecoder: accumulate decompressed output before firing channelRead by @franz1981 in #16510
Eliminate redundant bounds checks in CompositeByteBuf accessors by @franz1981 in #16525
Auto-port 4.2: Limit the number of Continuation frames per HTTP2 Headers by @netty-project-bot in #16536

New Contributors

@jmcrawford45 made their first contribution in #15919
@furkanvarol made their first contribution in #16279
@Songdoeon made their first contribution in #16207
@cuiweixie made their first contribution in #16312
@nikitanagar08 made their first contribution in #16415

Full Changelog: netty-4.2.10.Final...netty-4.2.11.Final