ESB-2026.3748

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3748 Security update for netty, netty-tcnative 16 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: netty netty-tcnative Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-33871 CVE-2026-33870 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261353-1 Comment: CVSS (Max): 7.5 CVE-2026-33870 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N EPSS (Max): 0.1% (23rd) CVE-2026-33871 2026-04-15 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for netty, netty-tcnative Announcement ID: SUSE-SU-2026:1353-1 Release Date: 2026-04-15T13:37:31Z Rating: important o bsc#1261031 References: o bsc#1261043 o CVE-2026-33870 Cross-References: o CVE-2026-33871 o CVE-2026-33870 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N /UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N o CVE-2026-33870 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N /S:U/C:N/I:H/A:N o CVE-2026-33870 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/ S:U/C:N/I:H/A:N o CVE-2026-33871 ( SUSE ): 8.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N /UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS scores: o CVE-2026-33871 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N /S:U/C:N/I:N/A:H o CVE-2026-33871 ( NVD ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/ UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/ MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/ MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X o CVE-2026-33871 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/ S:U/C:N/I:N/A:H o Development Tools Module 15-SP7 o openSUSE Leap 15.6 Affected o SUSE Linux Enterprise Desktop 15 SP7 Products: o SUSE Linux Enterprise Real Time 15 SP7 o SUSE Linux Enterprise Server 15 SP7 o SUSE Linux Enterprise Server for SAP Applications 15 SP7 o SUSE Package Hub 15 15-SP7 An update that solves two vulnerabilities can now be installed. Description: This update for netty, netty-tcnative fixes the following issues: Upidate to 4.1.132: o CVE-2026-33870: incorrectly parses quoted strings in HTTP/1.1 can lead to request smuggling (bsc#1261031). o CVE-2026-33871: sending a flood of CONTINUATION frames can lead to a denial of service (bsc#1261043). Changelog: o Upgrade to upstream version 4.1.132 o Fixes: o Fix Incorrect nanos-to-millis conversion in epoll_wait EINTR retry loop o Make RefCntOpenSslContext.deallocate more robust o HTTP2: Correctly account for padding when decompress o Fix high-order bit aliasing in HttpUtil.validateToken o fix: the precedence of + is higher than >> o AdaptiveByteBufAllocator: make sure byteBuf.capacity() not greater than byteBuf.maxCapacity() o AdaptivePoolingAllocator: call unreserveMatchingBuddy(...) if byteBuf initialization failed o Don't assume CertificateFactory is thread-safe o Fix HttpObjectAggregator leaving connection stuck after 413 with AUTO_READ= false o HTTP2: Ensure preface is flushed in all cases o Fix UnsupportedOperationException in readTrailingHeaders o Fix client_max_window_bits parameter handling in permessage-deflate extension o Native transports: Fix possible fd leak when fcntl fails. o Kqueue: Fix undefined behaviour when GetStringUTFChars fails and SO_ACCEPTFILTER is supported o Kqueue: Possible overflow when using netty_kqueue_bsdsocket_setAcceptFilter (...) o Native transports: Fix undefined behaviour when GetStringUTFChars fails while open FD o Epoll: Add null checks for safety reasons o Epoll: Use correct value to initialize mmsghdr.msg_namelen o Epoll: Fix support for IP_RECVORIGDSTADDR o AdaptivePoolingAllocator: remove ensureAccessible() call in capacity(int) method o Epoll: setTcpMg5Sig(...) might overflow o JdkZlibDecoder: accumulate decompressed output before firing channelRead o Limit the number of Continuation frames per HTTP2 Headers (bsc#1261043, CVE-2026-33871) o Stricter HTTP/1.1 chunk extension parsing (bsc#1261031, CVE-2026-33870) o rediff o Upgrade to upstream version 4.1.131 o NioDatagramChannel.block(...) does not early return on failure o Support for AWS Libcrypto (AWS-LC) netty-tcnative build o codec-dns: Decompress MX RDATA exchange domain names during DNS record decoding o Buddy allocation for large buffers in adaptive allocator o SslHandler: Only resume on EventLoop if EventLoop is not shutting down already o Wrap ECONNREFUSED in PortUnreachableException for UDP o Bump com.ning:compress-lzf (4.1) o Fix adaptive allocator bug from not noticing failed allocation o Avoid loosing original read exception o Backport multiple adaptive allocator changes o Upgrade to version 4.1.130 o Upgrade to version 2.0.75 Final o No formal changelog present o Needed by netty >= 4.2.11 Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: o openSUSE Leap 15.6 zypper in -t patch openSUSE-SLE-15.6-2026-1353=1 o Development Tools Module 15-SP7 zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP7-2026-1353=1 o SUSE Package Hub 15 15-SP7 zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-1353= 1 Package List: o openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64) netty-tcnative-2.0.75-150200.3.36.1 netty-4.1.132-150200.4.43.1 o openSUSE Leap 15.6 (noarch) netty-tcnative-javadoc-2.0.75-150200.3.36.1 netty-javadoc-4.1.132-150200.4.43.1 o Development Tools Module 15-SP7 (aarch64 ppc64le s390x x86_64) netty-tcnative-2.0.75-150200.3.36.1 netty-tcnative-debugsource-2.0.75-150200.3.36.1 o SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x x86_64) netty-4.1.132-150200.4.43.1 o SUSE Package Hub 15 15-SP7 (noarch) netty-javadoc-4.1.132-150200.4.43.1 References: o https://www.suse.com/security/cve/CVE-2026-33870.html o https://www.suse.com/security/cve/CVE-2026-33871.html o https://bugzilla.suse.com/show_bug.cgi?id=1261031 o https://bugzilla.suse.com/show_bug.cgi?id=1261043 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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