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Debian Security Advisory DSA-4279-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
August 20, 2018                       https://www.debian.org/security/faq
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Package        : linux
CVE ID         : CVE-2018-3620 CVE-2018-3646

Multiple researchers have discovered a vulnerability in the way the
Intel processor designs have implemented speculative execution of
instructions in combination with handling of page-faults. This flaw
could allow an attacker controlling an unprivileged process to read
memory from arbitrary (non-user controlled) addresses, including from
the kernel and all other processes running on the system or cross
guest/host boundaries to read host memory.

To fully resolve these vulnerabilities it is also necessary to install
updated CPU microcode (only available in Debian non-free). Common server
class CPUs are covered in the update released as DSA 4273-1.

For the stable distribution (stretch), these problems have been fixed in
version 4.9.110-3+deb9u3.

We recommend that you upgrade your linux packages.

For the detailed security status of linux please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/linux

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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