SB2023041840 - Ubuntu kernel live patch security update

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2023041840

SB2023041840 - Ubuntu kernel live patch security update

Published: April 18, 2023

Security Bulletin ID SB2023041840
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) NULL pointer dereference (CVE-ID: CVE-2023-0468)

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

The vulnerability exists due to a NULL pointer dereference error in the io_poll_check_events() function in io_uring/poll.c within the io_uring subcomponent in the Linux Kernel. A local user can perform a denial of service (DoS) attack.


2) Use-after-free (CVE-ID: CVE-2023-1281)

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

The vulnerability exists due to a use-after-free error in Linux kernel traffic control index filter (tcindex) when the tcf_exts_exec() function is called with the destroyed tcf_ext. A local user attacker can trigger a use-after-free error and execute arbitrary code with elevated privileges.



Remediation

Install update from vendor's website.

References