An intel-microcode security update has been released for both Debian GNU/Linux 9 and 10. This update ships updated CPU microcode for some types of Intel CPUs. In particular it provides mitigations for the TAA (TSX Asynchronous Abort) vulnerability.

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Debian Security Advisory DSA-4565-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
November 13, 2019 https://www.debian.org/security/faq
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Package : intel-microcode
CVE ID : CVE-2019-11135 CVE-2019-11139

This update ships updated CPU microcode for some types of Intel CPUs. In
particular it provides mitigations for the TAA (TSX Asynchronous Abort)
vulnerability. For affected CPUs, to fully mitigate the vulnerability it
is also necessary to update the Linux kernel packages as released in DSA
4564-1.

For the oldstable distribution (stretch), these problems have been fixed
in version 3.20191112.1~deb9u1.

For the stable distribution (buster), these problems have been fixed in
version 3.20191112.1~deb10u1.

We recommend that you upgrade your intel-microcode packages.

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

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/