SB2020121419 - Use-after-free in Linux kernel
Published: December 14, 2020
Security Bulletin ID
SB2020121419
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2020-27825)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in kernel/trace/ring_buffer.c in Linux kernel, when trace_open and resize of cpu buffer are running in parallel on different CPUs. A local user can run a specially crafted application and perform a denial of service attack or read contentsof kernel memory.
Remediation
Install update from vendor's website.