USN-3690-2
amd64-microcode regression
USN-3690-1 provided updated microcode for AMD processors to address CVE-2017-5715 (aka Spectre). Unfortunately, the update caused some systems to fail to boot. This update reverts the update for Ubuntu 14.04 LTS.
We apologize for the inconvenience.
Original advisory details:
Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory.
This update provides the microcode updates for AMD 17H family processors required for the corresponding Linux kernel updates.
What each source reports
OSV No score
amd64-microcode regression
USN-3690-1 provided updated microcode for AMD processors to address CVE-2017-5715 (aka Spectre). Unfortunately, the update caused some systems to fail to boot. This update reverts the update for Ubuntu 14.04 LTS.
We apologize for the inconvenience.
Original advisory details:
Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory.
This update provides the microcode updates for AMD 17H family processors required for the corresponding Linux kernel updates.
- Record
USN-3690-2- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
amd64-microcodeUbuntu:14.04:LTS |
before 3.20180524.1~ubuntu0.14.04.2+really20130710.1, plus listed versions 1.20120910-32.20131007.1+really20130710.13.20180524.1~ubuntu0.14.04.1 |
3.20180524.1~ubuntu0.14.04.2+really20130710.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
USN-3690-2 is a vulnerability with no CVSS score yet in amd64-microcode, published July 5, 2018. No source lists public exploit code. Fixed in amd64-microcode 3.20180524.1~ubuntu0.14.04.2+really20130710.1.