CVE-2021-33117

Publication date 12 May 2022

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Improper access control for some 3rd Generation Intel(R) Xeon(R) Scalable Processors before BIOS version MR7, may allow a local attacker to potentially enable information disclosure via local access.

From the Ubuntu Security Team

It was discovered that some Intel processors did not properly restrict access in some situations. This may allow a local attacker to obtain sensitive information.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
intel-microcode	22.10 kinetic	Fixed 3.20220207.1ubuntu1
	22.04 LTS jammy	Fixed 3.20220510.0ubuntu0.22.04.1
	21.10 impish	Fixed 3.20220510.0ubuntu0.21.10.1
	20.04 LTS focal	Fixed 3.20220510.0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 3.20220510.0ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 3.20220510.0ubuntu0.16.04.1+esm1
	14.04 LTS trusty	Ignored end of ESM support, was ignored [early microcode loading not allowed]

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Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.5 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	None
Availability impact	None

Scores

Parameter	Value
Base score	5.5 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-5486-1
Intel Microcode vulnerabilities
20 June 2022

USN-5535-1
Intel Microcode vulnerabilities
28 July 2022