<p>Upgrade <code>Rocky-Linux:8</code> <code>kernel</code> to version 0:4.18.0-305.12.1.el8_4 or higher.<br>This issue was patched in <code>RLSA-2021:3057</code>.</p>

Out-of-Bounds Affecting kernel package, versions <0:4.18.0-305.12.1.el8_4

Threat Intelligence

0.04% (6^th percentile)

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Snyk ID SNYK-ROCKY8-KERNEL-3289744
published 3 Feb 2023
disclosed 26 May 2021

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Introduced: 26 May 2021

CVE-2021-22543 Open this link in a new tab CWE-119 Open this link in a new tab

How to fix?

Upgrade Rocky-Linux:8 kernel to version 0:4.18.0-305.12.1.el8_4 or higher.
This issue was patched in RLSA-2021:3057.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Local
Attack Complexity (AC)

Low
Privileges Required (PR)

Low
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

High
Integrity (I)

High
Availability (A)

High

Out-of-Bounds Affecting kernel package, versions <0:4.18.0-305.12.1.el8_4

Severity

Based on Rocky Linux security rating