CVE-2024-21853

Publication date 13 November 2024

Last updated 3 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.7 · Medium

Score breakdown

Improper finite state machines (FSMs) in the hardware logic in some 4th and 5th Generation Intel(R) Xeon(R) Processors may allow an authorized user to potentially enable denial of service via local access.

From the Ubuntu Security Team

It was discovered that some 4th and 5th Generation Intel(R) Xeon(R) Processors did not properly implement finite state machines (FSMs) in hardware logic. THis may allow a local privileged attacker to cause a denial of service (system crash).

Status

Package Ubuntu Release Status
intel-microcode 24.10 oracular
Fixed 3.20241112.0ubuntu0.24.10.1
24.04 LTS noble
Fixed 3.20241112.0ubuntu0.24.04.1
22.04 LTS jammy
Fixed 3.20241112.0ubuntu0.22.04.1
20.04 LTS focal
Fixed 3.20241112.0ubuntu0.20.04.1
18.04 LTS bionic
Fixed 3.20241112.0ubuntu0.18.04.1+esm1
16.04 LTS xenial
Fixed 3.20241112.0ubuntu0.16.04.1+esm1
14.04 LTS trusty Ignored trusty doesn't support late loading of microcode

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro

Severity score breakdown

Parameter Value
Base score 4.7 · Medium
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H