<div class="container">
<h1>Security update for netty, netty-tcnative</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:1353-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-04-15T13:37:31Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>important</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1261031">bsc#1261031</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1261043">bsc#1261043</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>
Cross-References:
</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-33870.html">CVE-2026-33870</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-33871.html">CVE-2026-33871</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>CVSS scores:</th>
<td>
<ul class="list-group">
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33870</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.7</span>
<span class="cvss-vector">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</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33870</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33870</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33871</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.2</span>
<span class="cvss-vector">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</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33871</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">5.9</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33871</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">8.7</span>
<span class="cvss-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/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</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-33871</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">Development Tools Module 15-SP7</li>
<li class="list-group-item">openSUSE Leap 15.6</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Real Time 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP7</li>
<li class="list-group-item">SUSE Package Hub 15 15-SP7</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves two vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>This update for netty, netty-tcnative fixes the following issues:</p>
<p>Upidate to 4.1.132:</p>
<ul>
<li>CVE-2026-33870: incorrectly parses quoted strings in HTTP/1.1 can lead to request smuggling (bsc#1261031).</li>
<li>CVE-2026-33871: sending a flood of CONTINUATION frames can lead to a denial of service (bsc#1261043).</li>
</ul>
<p>Changelog:</p>
<ul>
<li>Upgrade to upstream version 4.1.132</li>
<li>Fixes:</li>
<li>Fix Incorrect nanos-to-millis conversion in epoll_wait EINTR
retry loop</li>
<li>Make RefCntOpenSslContext.deallocate more robust</li>
<li>HTTP2: Correctly account for padding when decompress</li>
<li>Fix high-order bit aliasing in HttpUtil.validateToken</li>
<li>fix: the precedence of + is higher than >></li>
<li>AdaptiveByteBufAllocator: make sure byteBuf.capacity() not
greater than byteBuf.maxCapacity()</li>
<li>AdaptivePoolingAllocator: call unreserveMatchingBuddy(...)
if byteBuf initialization failed</li>
<li>Don't assume CertificateFactory is thread-safe</li>
<li>Fix HttpObjectAggregator leaving connection stuck after 413
with AUTO_READ=false</li>
<li>HTTP2: Ensure preface is flushed in all cases</li>
<li>Fix UnsupportedOperationException in readTrailingHeaders</li>
<li>Fix client_max_window_bits parameter handling in
permessage-deflate extension</li>
<li>Native transports: Fix possible fd leak when fcntl fails.</li>
<li>Kqueue: Fix undefined behaviour when GetStringUTFChars fails
and SO_ACCEPTFILTER is supported</li>
<li>Kqueue: Possible overflow when using
netty_kqueue_bsdsocket_setAcceptFilter(...)</li>
<li>Native transports: Fix undefined behaviour when
GetStringUTFChars fails while open FD</li>
<li>Epoll: Add null checks for safety reasons</li>
<li>Epoll: Use correct value to initialize mmsghdr.msg_namelen</li>
<li>Epoll: Fix support for IP_RECVORIGDSTADDR</li>
<li>AdaptivePoolingAllocator: remove ensureAccessible() call in
capacity(int) method</li>
<li>Epoll: setTcpMg5Sig(...) might overflow</li>
<li>JdkZlibDecoder: accumulate decompressed output before firing
channelRead</li>
<li>Limit the number of Continuation frames per HTTP2 Headers
(bsc#1261043, CVE-2026-33871)</li>
<li>Stricter HTTP/1.1 chunk extension parsing (bsc#1261031,
CVE-2026-33870)</li>
<li>rediff</li>
<li>Upgrade to upstream version 4.1.131</li>
<li>NioDatagramChannel.block(...) does not early return on failure</li>
<li>Support for AWS Libcrypto (AWS-LC) netty-tcnative build</li>
<li>codec-dns: Decompress MX RDATA exchange domain names during
DNS record decoding</li>
<li>Buddy allocation for large buffers in adaptive allocator</li>
<li>SslHandler: Only resume on EventLoop if EventLoop is not
shutting down already</li>
<li>Wrap ECONNREFUSED in PortUnreachableException for UDP</li>
<li>Bump com.ning:compress-lzf (4.1)</li>
<li>Fix adaptive allocator bug from not noticing failed allocation</li>
<li>Avoid loosing original read exception</li>
<li>Backport multiple adaptive allocator changes</li>
<li>Upgrade to version 4.1.130</li>
<li>Upgrade to version 2.0.75 Final</li>
<li>No formal changelog present</li>
<li>Needed by netty >= 4.2.11</li>
</ul>
<h2>Patch Instructions:</h2>
<p>
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".<br/>
Alternatively you can run the command listed for your product:
</p>
<ul class="list-group">
<li class="list-group-item">
openSUSE Leap 15.6
<br/>
<code>zypper in -t patch openSUSE-SLE-15.6-2026-1353=1</code>
</li>
<li class="list-group-item">
Development Tools Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP7-2026-1353=1</code>
</li>
<li class="list-group-item">
SUSE Package Hub 15 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-1353=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64)
<ul>
<li>netty-tcnative-2.0.75-150200.3.36.1</li>
<li>netty-4.1.132-150200.4.43.1</li>
</ul>
</li>
<li>
openSUSE Leap 15.6 (noarch)
<ul>
<li>netty-tcnative-javadoc-2.0.75-150200.3.36.1</li>
<li>netty-javadoc-4.1.132-150200.4.43.1</li>
</ul>
</li>
<li>
Development Tools Module 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>netty-tcnative-2.0.75-150200.3.36.1</li>
<li>netty-tcnative-debugsource-2.0.75-150200.3.36.1</li>
</ul>
</li>
<li>
SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>netty-4.1.132-150200.4.43.1</li>
</ul>
</li>
<li>
SUSE Package Hub 15 15-SP7 (noarch)
<ul>
<li>netty-javadoc-4.1.132-150200.4.43.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-33870.html">https://www.suse.com/security/cve/CVE-2026-33870.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-33871.html">https://www.suse.com/security/cve/CVE-2026-33871.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1261031">https://bugzilla.suse.com/show_bug.cgi?id=1261031</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1261043">https://bugzilla.suse.com/show_bug.cgi?id=1261043</a>
</li>
</ul>
</div>