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release fktrace errata.

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<h2>
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<font color="#0000ff"><i>Open</i></font><font color="#000084">BSD</font></a>
<font color="#e00000">6.2 Errata</font>
</h2>
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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>,
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<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>.
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<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-6.2/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/6.2.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_tcb_invalid">
<font color="#009000">
<strong>001: RELIABILITY FIX: October 13, 2017</strong></font>
&nbsp; <i>amd64</i>
<br>
A local user could trigger a kernel panic by using an invalid TCB value.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/001_tcb_invalid.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p002_fktrace">
<font color="#009000">
<strong>002: SECURITY FIX: December 1, 2017</strong></font>
&nbsp; <i>All architectures</i>
<br>
The fktrace(2) system call had insufficient security checks.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/002_fktrace.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

</ul>

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