CVE-2019-11810 : What You Need to Know

A vulnerability was found in the Linux kernel versions prior to 5.0.7, leading to a Denial of Service attack due to a use-after-free scenario.

Understanding CVE-2019-11810

This CVE identifies a vulnerability in the Linux kernel that can result in a NULL pointer dereference, potentially leading to a Denial of Service attack.

What is CVE-2019-11810?

This vulnerability is caused by a failure in the megasas_create_frame_pool() function within the megasas_alloc_cmds() function in drivers/scsi/megaraid/megaraid_sas_base.c.

The Impact of CVE-2019-11810

The vulnerability can be exploited to trigger a Denial of Service attack due to a use-after-free scenario, potentially disrupting the affected system's normal operation.

Technical Details of CVE-2019-11810

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The issue in the Linux kernel before version 5.0.7 allows for a NULL pointer dereference when a specific function fails, potentially leading to a Denial of Service.

Affected Systems and Versions

Affected systems: Linux kernel versions prior to 5.0.7
Affected function: megasas_create_frame_pool() within megasas_alloc_cmds() in drivers/scsi/megaraid/megaraid_sas_base.c

Exploitation Mechanism

The vulnerability can be exploited by causing the megasas_create_frame_pool() function to fail, triggering the NULL pointer dereference and potentially leading to a Denial of Service attack.

Mitigation and Prevention

Protecting systems from CVE-2019-11810 requires immediate action and long-term security practices.

Immediate Steps to Take

Update to a patched version of the Linux kernel (5.0.7 or newer) to mitigate the vulnerability.
Monitor vendor advisories and apply relevant security patches promptly.

Long-Term Security Practices

Regularly update and patch all software components to address known vulnerabilities.
Implement proper access controls and network segmentation to limit the impact of potential attacks.
Conduct regular security assessments and audits to identify and remediate security weaknesses.

Patching and Updates

Patch the Linux kernel to version 5.0.7 or later to address the vulnerability.