SB2022072725 - Privilege escalation in Linux kernel FBIOPUT_VSCREENINFO
Published: July 27, 2022
Security Bulletin ID
SB2022072725
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 security vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2021-33655)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write error and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.