SB2022120621 - Red Hat Enterprise Linux 8.6 Extended Update Support update for kernel

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Main Vulnerability Database SB2022120621

SB2022120621 - Red Hat Enterprise Linux 8.6 Extended Update Support update for kernel

Published: December 6, 2022 Updated: June 8, 2023

Security Bulletin ID SB2022120621
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2022-1158)

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due the KVM implementation in Linux kernel does not properly perform guest page table updates in some situations. A remote user on the guest operating system can trigger memory corruption and perform a denial of service attack against the host OS.


2) Integer underflow (CVE-ID: CVE-2022-2639)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer underflow within the reserve_sfa_size() function in the openvswitch kernel module in Linux kernel. A local user can trigger an out-of-bounds read error and crash the system or escalate privileges.



Remediation

Install update from vendor's website.

References