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<h2 id=OpenBSD>
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<i>Open</i><b>BSD</b></a>
6.9 Errata
</h2>
<hr>

For errata on a certain release, click below:<br>
<a href="errata20.html">2.0</a>,
<a href="errata21.html">2.1</a>,
<a href="errata22.html">2.2</a>,
<a href="errata23.html">2.3</a>,
<a href="errata24.html">2.4</a>,
<a href="errata25.html">2.5</a>,
<a href="errata26.html">2.6</a>,
<a href="errata27.html">2.7</a>,
<a href="errata28.html">2.8</a>,
<a href="errata29.html">2.9</a>,
<a href="errata30.html">3.0</a>,
<a href="errata31.html">3.1</a>,
<a href="errata32.html">3.2</a>,
<a href="errata33.html">3.3</a>,
<a href="errata34.html">3.4</a>,
<a href="errata35.html">3.5</a>,
<br>
<a href="errata36.html">3.6</a>,
<a href="errata37.html">3.7</a>,
<a href="errata38.html">3.8</a>,
<a href="errata39.html">3.9</a>,
<a href="errata40.html">4.0</a>,
<a href="errata41.html">4.1</a>,
<a href="errata42.html">4.2</a>,
<a href="errata43.html">4.3</a>,
<a href="errata44.html">4.4</a>,
<a href="errata45.html">4.5</a>,
<a href="errata46.html">4.6</a>,
<a href="errata47.html">4.7</a>,
<a href="errata48.html">4.8</a>,
<a href="errata49.html">4.9</a>,
<a href="errata50.html">5.0</a>,
<a href="errata51.html">5.1</a>,
<br>
<a href="errata52.html">5.2</a>,
<a href="errata53.html">5.3</a>,
<a href="errata54.html">5.4</a>,
<a href="errata55.html">5.5</a>,
<a href="errata56.html">5.6</a>,
<a href="errata57.html">5.7</a>,
<a href="errata58.html">5.8</a>,
<a href="errata59.html">5.9</a>,
<a href="errata60.html">6.0</a>,
<a href="errata61.html">6.1</a>,
<a href="errata62.html">6.2</a>,
<a href="errata63.html">6.3</a>,
<a href="errata64.html">6.4</a>,
<a href="errata65.html">6.5</a>,
<a href="errata66.html">6.6</a>,
<a href="errata67.html">6.7</a>,
<br>
<a href="errata68.html">6.8</a>,
<a href="errata70.html">7.0</a>,
<a href="errata71.html">7.1</a>,
<a href="errata72.html">7.2</a>,
<a href="errata73.html">7.3</a>,
<a href="errata74.html">7.4</a>,
<a href="errata75.html">7.5</a>,
<a href="errata76.html">7.6</a>,
<a href="errata77.html">7.7</a>.
<hr>

<p>
Patches for the OpenBSD base system are distributed as unified diffs.
Each patch is cryptographically signed with the
<a href="https://man.openbsd.org/OpenBSD-6.9/signify.1">signify(1)</a> tool and contains
usage instructions.
All the following patches are also available in one
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9.tar.gz">tar.gz file</a>
for convenience.

<p>
Alternatively, the <a href="https://man.openbsd.org/syspatch">syspatch(8)</a>
utility can be used to apply binary updates on the following architectures:
amd64, i386, arm64.

<p>
Patches for supported releases are also incorporated into the
<a href="stable.html">-stable branch</a>.

<hr>

<ul>

<li id="p001_vmd">
<strong>001: RELIABILITY FIX: May 4, 2021</strong>
&nbsp; <i>amd64</i>
<br>
vmd guests can trigger excessive log messages on the host by sending
certain network packets.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/001_vmd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p002_libx11">
<strong>002: SECURITY FIX: May 18, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
Request length checks were missing in libX11.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/002_libx11.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p003_vmd">
<strong>003: SECURITY FIX: May 18, 2021</strong>
&nbsp; <i>amd64</i>
<br>
vmd guest virtio drivers could cause stack overflows by crafting
invalid virtio descriptor lengths.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/003_vmd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p004_net80211">
<strong>004: SECURITY FIX: May 21, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
Insufficient validation of A-MSDUs and fragmented 802.11 frames could
be abused to inject arbitrary frames.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/004_net80211.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p005_pmapglobal">
<strong>005: RELIABILITY FIX: May 24, 2021</strong>
&nbsp; <i>amd64</i>
<br>
Recent Intel machines could crash or hang as global mappings were
not flushed from TLB.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/005_pmapglobal.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p006_cpuswitch">
<strong>006: RELIABILITY FIX: June 8, 2021</strong>
&nbsp; <i>amd64</i>
<br>
Recent Intel or any AMD machines could crash as the kernel did not
flush all TLBs that multi threaded processes require.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/006_cpuswitch.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p007_inteldrm">
<strong>007: RELIABILITY FIX: June 8, 2021</strong>
&nbsp; <i>amd64, i386</i>
<br>
Disable PPGTT on Intel machines with cherryview/braswell graphics
to avoid memory corruption.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/007_inteldrm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p008_vmd">
<strong>008: SECURITY FIX: June 9, 2021</strong>
&nbsp; <i>amd64</i>
<br>
vmd guests could cause stack overflows by crafting malicious dhcp
requests when using local interfaces.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/008_vmd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p009_bgpd">
<strong>009: RELIABILITY FIX: June 25, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
During config reloads of bgpd(8), prefixes of the wrong address family
could leak to peers resulting in session resets.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/009_bgpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p010_relayd">
<strong>010: SECURITY FIX: July 25, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
relayd(8), when using the http protocol strip filter directive or http
protocol macro expansion, processes format strings.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/010_relayd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p011_strchr">
<strong>011: SECURITY FIX: July 25, 2021</strong>
&nbsp; <i>mips64</i>
<br>
On mips64, the strchr/index/strrchr/rindex functions in libc handled
signed characters incorrectly.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/011_strchr.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p012_vmparam"> 
<strong>012: RELIABILITY FIX: August 04, 2021</strong>
&nbsp; <i>sparc64</i>
<br>
A missaligned address could trigger a kernel assert and panic the kernel.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/012_vmparam.patch.sig"> 
A source code patch exists which remedies this problem.</a>
<p>

<li id="p013_wg">
<strong>013: RELIABILITY FIX: August 11, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
In a specific configuration, wg(4) leaked mbufs.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/013_wg.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p014_perl">
<strong>014: SECURITY FIX: August 11, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
perl(1) Encode (3p) loads a module from an incorrect relative path.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/014_perl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p015_x509">
<strong>015: SECURITY FIX: August 20, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
In LibreSSL, printing a certificate can result in a crash in
X509_CERT_AUX_print().
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/015_x509.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p016_sshd">
<strong>016: SECURITY FIX: September 27, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
sshd(8) failed to clear supplemental groups when executing an
AuthorizedUsersCommand or AuthorizedPrincipalsCommand helper program.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/016_sshd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="017_x509">
<strong>017: SECURITY FIX: September 27, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
In libcrypto, part of LibreSSL, a stack overread could occur when 
checking X.509 name constraints.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/017_x509.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p018_cert">
<strong>018: RELIABILITY FIX: September 30, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
Compensate for the expiry of the DST Root X3 certificate.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/018_cert.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p019_bpf">
<strong>019: RELIABILITY FIX: October 31, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
Opening /dev/bpf too often could lead to resource exhaustion.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/019_bpf.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p020_uipc">
<strong>020: SECURITY FIX: October 31, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
The kernel could leak memory when closing unix sockets.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/020_uipc.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p021_rpki">
<strong>021: SECURITY FIX: November 9, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
rpki-client(8) should handle CA misbehaviours as soft-errors.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/021_rpki.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p022_unpcon">
<strong>022: RELIABILITY FIX: November 26, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
An unprivileged user could crash the kernel by using UNIX-domain
sockets in multiple threads.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/022_unpcon.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p023_rpki">
<strong>023: RELIABILITY FIX: December 7, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
Errata 021 broke rpki-client(8) compatibility with bgpd(8)
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/023_rpki.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p024_xserver">
<strong>024: SECURITY FIX: December 14, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
Multiple input validation failures in the X server request parsing
code can lead to out of bounds memory accesses for authorized
clients.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/024_xserver.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p025_mrt">
<strong>025: SECURITY FIX: December 16, 2021</strong>
&nbsp; <i>All architectures</i>
<br>
If multicast routing is used, kernel memory is leaked to userland.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/025_mrt.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p026_expat">
<strong>026: SECURITY FIX: January 19, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
Fix 8 security issues in libexpat, all related to fixed-size integer
math (integer overflow and invalid shifts) near memory allocation.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/026_expat.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p027_ppctrap">
<strong>027: SECURITY FIX: January 24, 2022</strong>
&nbsp; <i>macppc</i>
<br>
On PowerPC kernel memory is leaked to userland.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/027_ppctrap.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p028_gpuflush">
<strong>028: RELIABILITY FIX: February 2, 2022</strong>
&nbsp; <i>amd64 i386</i>
<br>
Userspace controlled code on GPU can access kernel memory on Intel
gen 8 and later GPUs.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/028_gpuflush.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p029_expat">
<strong>029: SECURITY FIX: February 2, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
Fix two security issues in libexpat related to integer overflow.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/029_expat.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p030_slaacd">
<strong>030: SECURITY FIX: February 21, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
More than 7 nameservers in an IPv6 router advertisement could crash slaacd.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p031_expat">
<strong>031: SECURITY FIX: February 24, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
Fix five security issues in libexpat related to encoding, stack
exhaustion, and integer overflow.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/031_expat.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p032_bignum">
<strong>032: SECURITY FIX: March 15, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
A malicious certificate can cause an infinite loop.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/032_bignum.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p033_slaacd">
<strong>033: SECURITY FIX: March 22, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
A malicious router advertisement could overflow heap memory in
unprivileged slaacd process.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/033_slaacd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p034_zlib">
<strong>034: SECURITY FIX: April 1, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
Memory corruption in zlib can lead to a crash.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/034_zlib.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p035_syszlib">
<strong>035: SECURITY FIX: April 5, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
Fix zlib vulnerability in PPP and IPComp compression.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/035_syszlib.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p036_rpki">
<strong>036: RELIABILITY FIX: April 11, 2022</strong>
&nbsp; <i>All architectures</i>
<br>
rpki-client(8) handled time zones incorrectly.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/036_rpki.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

</ul>

<hr>