SB2022022328 - Fedora 34 update for kernel

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Main Vulnerability Database SB2022022328

SB2022022328 - Fedora 34 update for kernel

Published: February 23, 2022

Security Bulletin ID SB2022022328
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Security restrictions bypass (CVE-ID: CVE-2022-23222)

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

The vulnerability exists due to availability of pointer arithmetic via certain *_OR_NULL pointer types in kernel/bpf/verifier.c in the Linux kernel. A local user can run a specially crafted program to execute arbitrary code with root privileges.


2) Out-of-bounds write (CVE-ID: CVE-2022-0500)

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

The vulnerability exists due to a boundary error in unrestricted eBPF usage by the BPF_BTF_LOAD in Linux kernel. A local user can trigger an out-of-bounds write error in BPF subsystem and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References