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SUSE SLED15 / SLES15 / openSUSE 15 Security Update : netty, netty-tcnative (SUSE-SU-2026:1353-1)

high Nessus Plugin ID 306709

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1353-1 advisory.

 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

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected netty, netty-javadoc, netty-tcnative and / or netty-tcnative-javadoc packages.

See Also

https://bugzilla.suse.com/1261031

https://bugzilla.suse.com/1261043

https://lists.suse.com/pipermail/sle-updates/2026-April/045563.html

https://www.suse.com/security/cve/CVE-2026-33870

https://www.suse.com/security/cve/CVE-2026-33871

Plugin Details

Severity: High

ID: 306709

File Name: suse_SU-2026-1353-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/16/2026

Updated: 4/16/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-33871

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

Vector: 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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:netty, p-cpe:/a:novell:suse_linux:netty-javadoc, p-cpe:/a:novell:suse_linux:netty-tcnative, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/15/2026

Vulnerability Publication Date: 3/26/2026

Reference Information

CVE: CVE-2026-33870, CVE-2026-33871

SuSE: SUSE-SU-2026:1353-1