USN-6485-1: Intel Microcode vulnerability
17 November 2023
The system could be made to crash or expose sensitive information under certain conditions.
Releases
Packages
- intel-microcode - Processor microcode for Intel CPUs
Details
Benoit Morgan, Paul Grosen, Thais Moreira Hamasaki, Ke Sun, Alyssa Milburn,
Hisham Shafi, Nir Shlomovich, Tavis Ormandy, Daniel Moghimi, Josh Eads, Salman
Qazi, Alexandra Sandulescu, Andy Nguyen, Eduardo Vela, Doug Kwan, and Kostik
Shtoyk discovered that some Intel(R) Processors did not properly handle certain
sequences of processor instructions. A local attacker could possibly use this to
cause a core hang (resulting in a denial of service), gain access to sensitive
information or possibly escalate their privileges.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 23.10
Ubuntu 23.04
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
-
intel-microcode
-
3.20231114.0ubuntu0.18.04.1+esm1
Available with Ubuntu Pro
Ubuntu 16.04
-
intel-microcode
-
3.20231114.0ubuntu0.16.04.1+esm1
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.