An amd64-microcode security update has been released for Debian GNU/Linux 8 LTS.

Package : amd64-microcode
Version : 3.20181128.1~deb8u1
CVE ID : CVE-2017-5715
Debian Bug : 886382

It was discovered that systems with microprocessors utilizing
speculative execution and indirect branch prediction may allow
unauthorized disclosure of information to an attacker with local
user access via a side-channel analysis (Spectre v2).
Multiple fixes were done already in Linux kernel, intel-microcode etc.
This fix adds amd-microcode-based IBPB support.

For Debian 8 "Jessie", this problem has been fixed in version
3.20181128.1~deb8u1.

We recommend that you upgrade your amd64-microcode package.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequent