SB2022022231 - Red Hat Linux for Real Time 8.2 update for kernel-rt 

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Main Vulnerability Database SB2022022231

SB2022022231 - Red Hat Linux for Real Time 8.2 update for kernel-rt

Published: February 22, 2022

Security Bulletin ID SB2022022231
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2021-0920)

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

The vulnerability exists due to a use-after-free error within the unix_scm_to_skb() function of af_unix.c in Linux kernel. A local user can run a specially crafted program to trigger a race condition and execute arbitrary code with elevated privileges.



2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-4155)

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to the OS kernel does not impose correctly security restrictions. A local user can gain access to sensitive information on the system.


3) Use-after-free (CVE-ID: CVE-2021-4028)

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

The vulnerability exists due to a use-after-free error in the RDMA listen() function in Linux kernel. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.



Remediation

Install update from vendor's website.

References