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<define-tag description>LTS security update</define-tag>
<define-tag moreinfo>
<p>Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.</p>
<ul>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-14821">CVE-2019-14821</a>
<p>Matt Delco reported a race condition in KVM's coalesced MMIO
facility, which could lead to out-of-bounds access in the kernel.
A local attacker permitted to access /dev/kvm could use this to
cause a denial of service (memory corruption or crash) or possibly
for privilege escalation.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-14835">CVE-2019-14835</a>
<p>Peter Pi of Tencent Blade Team discovered a missing bounds check
in vhost_net, the network back-end driver for KVM hosts, leading
to a buffer overflow when the host begins live migration of a VM.
An attacker in control of a VM could use this to cause a denial of
service (memory corruption or crash) or possibly for privilege
escalation on the host.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-15117">CVE-2019-15117</a>
<p>Hui Peng and Mathias Payer reported a missing bounds check in the
usb-audio driver's descriptor parsing code, leading to a buffer
over-read. An attacker able to add USB devices could possibly use
this to cause a denial of service (crash).</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-15118">CVE-2019-15118</a>
<p>Hui Peng and Mathias Payer reported unbounded recursion in the
usb-audio driver's descriptor parsing code, leading to a stack
overflow. An attacker able to add USB devices could use this to
cause a denial of service (memory corruption or crash) or possibly
for privilege escalation. On the amd64 architecture this is
mitigated by a guard page on the kernel stack, so that it is only
possible to cause a crash.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-15902">CVE-2019-15902</a>
<p>Brad Spengler reported that a backporting error reintroduced a
spectre-v1 vulnerability in the ptrace subsystem in the
ptrace_get_debugreg() function.</p></li>
</ul>
<p>For Debian 8 <q>Jessie</q>, these problems have been fixed in version
4.9.189-3+deb9u1~deb8u1.</p>
<p>We recommend that you upgrade your linux-4.9 packages.</p>
<p>Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <a href="https://wiki.debian.org/LTS">https://wiki.debian.org/LTS</a></p>
</define-tag>
# do not modify the following line
#include "$(ENGLISHDIR)/lts/security/2019/dla-1940.data"
# $Id: $
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