CVE-2020-11565 : What You Need to Know
Discover the details of CVE-2020-11565, a disputed vulnerability in the Linux kernel through version 5.6.2, involving a stack-based out-of-bounds write. Learn about the impact, affected systems, exploitation, and mitigation steps.
An issue was discovered in the Linux kernel through 5.6.2. This vulnerability, identified as CID-aa9f7d5172fa, involves a stack-based out-of-bounds write in mpol_parse_str in mm/mempolicy.c due to mishandling of an empty nodelist during mount option parsing. The severity of this issue is disputed within the security community.
Understanding CVE-2020-11565
This CVE involves a potential vulnerability in the Linux kernel that may allow for a stack-based out-of-bounds write under specific conditions.
What is CVE-2020-11565?
The vulnerability in the Linux kernel through version 5.6.2 allows for a stack-based out-of-bounds write due to mishandling of an empty nodelist during mount option parsing.
The Impact of CVE-2020-11565
The impact of this vulnerability is disputed within the security community. While some argue it is a bug in parsing mount options that requires privileged user access, others consider it a potential security risk.
Technical Details of CVE-2020-11565
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The vulnerability involves a stack-based out-of-bounds write in mpol_parse_str in mm/mempolicy.c due to mishandling of an empty nodelist during mount option parsing.
Affected Systems and Versions
- Linux kernel through version 5.6.2
Exploitation Mechanism
The exploitation of this vulnerability requires specific conditions and privileged user access to trigger the bug.
Mitigation and Prevention
It is essential to take immediate steps to address and prevent potential exploitation of this vulnerability.
Immediate Steps to Take
- Monitor official sources for patches and updates
- Limit privileged user access to mitigate potential risks
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version
- Implement secure configuration practices to reduce the attack surface
Patching and Updates
- Apply patches provided by Linux distributions and kernel developers
- Stay informed about security advisories and updates from trusted sources