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<h2 id=OpenBSD>
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<i>Open</i><b>BSD</b></a>
6.6 Errata
</h2>
<hr>
For errata on a certain release, click below:<br>
<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>,
<a href="errata36.html">3.6</a>,
<br>
<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>,
<a href="errata52.html">5.2</a>,
<br>
<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>.
<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-6.6/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/6.6.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>, which is maintained for one year
after release.
<hr>
<ul>
<li id="p001_bpf">
<strong>001: RELIABILITY FIX: October 28, 2019</strong>
<i>All architectures</i>
<br>
bpf(4) has a race condition during device removal.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/001_bpf.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p002_ber">
<strong>002: RELIABILITY FIX: October 28, 2019</strong>
<i>All architectures</i>
<br>
Various third party applications may crash due to symbol collision.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/002_ber.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p003_bgpd">
<strong>003: RELIABILITY FIX: October 31, 2019</strong>
<i>All architectures</i>
<br>
bgpd(8) can crash on nexthop changes or during startup in certain
configurations.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/003_bgpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p004_net80211">
<strong>004: RELIABILITY FIX: November 16, 2019</strong>
<i>All architectures</i>
<br>
The kernel could crash due to a NULL pointer dereference in net80211.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/004_net80211.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p005_sysupgrade">
<strong>005: RELIABILITY FIX: November 16, 2019</strong>
<i>All architectures</i>
<br>
A new kernel may require newer firmware images when using sysupgrade.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/005_sysupgrade.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p006_ifioctl">
<strong>006: SECURITY FIX: November 16, 2019</strong>
<i>All architectures</i>
<br>
A regular user could change some network interface parameters due
to missing checks in the ioctl(2) system call.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/006_ifioctl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p007_inteldrm">
<strong>007: SECURITY FIX: November 22, 2019</strong>
<i>i386 and amd64</i>
<br>
A local user could cause the system to hang by reading specific
registers when Intel Gen8/Gen9 graphics hardware is in a low power state.
A local user could perform writes to memory that should be blocked with
Intel Gen9 graphics hardware.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/007_inteldrm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p008_mesa">
<strong>008: SECURITY FIX: November 22, 2019</strong>
<i>All architectures</i>
<br>
Shared memory regions used by some Mesa drivers had permissions which
allowed others to access that memory.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/008_mesa.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p009_mesaxlock">
<strong>009: SECURITY FIX: December 4, 2019</strong>
<i>All architectures</i>
<br>
Environment-provided paths are used for dlopen() in mesa, resulting in
escalation to the auth group in xlock(1).
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/009_mesaxlock.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p010_libcauth">
<strong>010: SECURITY FIX: December 4, 2019</strong>
<i>All architectures</i>
<br>
libc's authentication layer performed insufficient username validation.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/010_libcauth.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p011_xenodm">
<strong>011: SECURITY FIX: December 4, 2019</strong>
<i>All architectures</i>
<br>
xenodm uses the libc authentication layer incorrectly.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/011_xenodm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p012_suauth">
<strong>012: SECURITY FIX: December 8, 2019</strong>
<i>All architectures</i>
<br>
A user can log in with a different user's login class.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/012_suauth.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p013_ldso">
<strong>013: SECURITY FIX: December 11, 2019</strong>
<i>All architectures</i>
<br>
ld.so may fail to remove the LD_LIBRARY_PATH environment variable for
set-user-ID and set-group-ID executables in low memory conditions.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/013_ldso.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p014_eret">
<strong>014: SECURITY FIX: December 18, 2019</strong>
<i>arm64</i>
<br>
ARM64 CPUs speculatively execute instructions after ERET.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/014_eret.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
</ul>
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