CVE-2020-27835 : What You Need to Know

A use after free vulnerability in the Linux kernel infiniband hfi1 driver prior to version 5.10-rc6 allows a local user to crash the system.

Understanding CVE-2020-27835

This CVE identifies a specific vulnerability in the Linux kernel that can be exploited by a local user.

What is CVE-2020-27835?

CVE-2020-27835 is a use after free vulnerability in the Linux kernel infiniband hfi1 driver before version 5.10-rc6. It occurs when a user calls Ioctl after opening a dev file and fork, potentially leading to a system crash.

The Impact of CVE-2020-27835

The vulnerability could be exploited by a local user to crash the system, potentially causing a denial of service (DoS) situation.

Technical Details of CVE-2020-27835

This section provides more technical insights into the CVE.

Vulnerability Description

A use after free vulnerability in the Linux kernel infiniband hfi1 driver allows a local user to crash the system by manipulating certain calls.

Affected Systems and Versions

Product: Kernel
Vendor: N/A
Affected Versions: Kernel versions prior to 5.10-rc6

Exploitation Mechanism

The vulnerability can be exploited by a local user through specific actions involving Ioctl calls after opening a dev file and fork.

Mitigation and Prevention

Protecting systems from CVE-2020-27835 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches or updates provided by the vendor promptly.
Monitor security advisories for any new information or patches related to this vulnerability.

Long-Term Security Practices

Implement the principle of least privilege to restrict user actions.
Regularly update and patch the kernel to mitigate known vulnerabilities.

Patching and Updates

Ensure that the affected systems are updated to version 5.10-rc6 or later to address the vulnerability.