SB2023112173 - Privilege escalation in Linux kernel MCTP subsystem
Published: November 21, 2023
Security Bulletin ID
SB2023112173
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-0646)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the Linux kernel Management Component Transport Protocol (MCTP) subsystem. A local user can trigger a use-after-free error by calling the ancel_work_sync() function after the unregister_netdev during removing device and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.