CVE-2021-45095 : What You Need to Know
Learn about CVE-2021-45095, a vulnerability in the Linux kernel through 5.15.8, impacting the pep_sock_accept function. Find out the impact, affected versions, exploitation risks, and mitigation steps.
pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.
Understanding CVE-2021-45095
What is CVE-2021-45095?
CVE-2021-45095 is a vulnerability in the Linux kernel through version 5.15.8 that specifically affects the pep_sock_accept function in net/phonet/pep.c.
The Impact of CVE-2021-45095
The vulnerability leads to a refcount leak, potentially allowing attackers to cause a denial of service (DoS) or execute arbitrary code.
Technical Details of CVE-2021-45095
Vulnerability Description
pep_sock_accept function in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak, which can be exploited by attackers.
Affected Systems and Versions
- Product: Linux kernel
- Vendor: Linux
- Versions affected: up to 5.15.8
Exploitation Mechanism
Attackers can exploit this vulnerability to leak refcounts, leading to potential DoS or arbitrary code execution.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches provided by the Linux kernel maintainers.
- Monitor security advisories for updates and apply them promptly.
Long-Term Security Practices
- Regularly update and patch all software components to prevent known vulnerabilities.
- Implement network segregation and access controls to limit the impact of potential attacks.
- Conduct regular security assessments and audits to identify and address security weaknesses.
- Stay informed about cybersecurity best practices and follow industry-standard security guidelines.
Patching and Updates
Ensure that your Linux kernel is updated to a version that includes the patch for CVE-2021-45095 to mitigate the risk of exploitation.