SB2022040720 - Use-after-free in Linux kernel dma_buf
Published: April 7, 2022
Security Bulletin ID
SB2022040720
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) Use-after-free (CVE-ID: CVE-2021-0707)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in dma_buf. A local user can trigger a race between closing the dmabuf file and reading the dmabuf's debug info and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.