CVE-2020-27825 : What You Need to Know
Learn about CVE-2020-27825, a use-after-free flaw in the Linux kernel before version 5.10-rc1, leading to a denial of service issue and potential kernel information leak threats. Find mitigation steps and preventive measures here.
A use-after-free vulnerability in the Linux kernel before version 5.10-rc1 could lead to a denial of service (DOS) issue and potential kernel information leak threats.
Understanding CVE-2020-27825
This CVE involves a race problem in trace_open and resize of CPU buffer running concurrently on different CPUs, potentially causing a DOS problem.
What is CVE-2020-27825?
This CVE identifies a use-after-free flaw in kernel/trace/ring_buffer.c in the Linux kernel before version 5.10-rc1. The flaw could be exploited by a local attacker with specific user privileges to trigger a DOS condition and potentially leak kernel information.
The Impact of CVE-2020-27825
The vulnerability could result in a denial of service issue and a threat of kernel information leakage, posing a risk to the system's integrity and confidentiality.
Technical Details of CVE-2020-27825
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The use-after-free flaw in kernel/trace/ring_buffer.c allows for a race problem in trace_open and resize of CPU buffer, potentially leading to a DOS problem and kernel information leak threat.
Affected Systems and Versions
- Product: Kernel
- Vendor: N/A
- Versions affected: Before kernel 5.10-rc1
Exploitation Mechanism
The vulnerability can be exploited by a local attacker with specific user privileges to trigger a denial of service issue and potentially leak kernel information.
Mitigation and Prevention
Protect your system from CVE-2020-27825 with the following steps:
Immediate Steps to Take
- Apply relevant security patches promptly.
- Monitor vendor advisories for updates.
- Restrict user privileges to minimize the impact of potential attacks.
Long-Term Security Practices
- Implement regular security training for users and administrators.
- Employ network segmentation to contain potential threats.
- Conduct regular security audits and vulnerability assessments.
Patching and Updates
- Stay informed about security updates from the Linux kernel vendor.
- Apply patches as soon as they are available to mitigate the risk of exploitation.