CVE-2018-7480 : What You Need to Know

In versions prior to 4.11 of the Linux kernel, a vulnerability in the blkcg_init_queue function could allow local users to disrupt the system through a double free vulnerability.

Understanding CVE-2018-7480

This CVE entry highlights a potential denial of service vulnerability in the Linux kernel.

What is CVE-2018-7480?

The blkcg_init_queue function in the Linux kernel before version 4.11 could be exploited by local users to trigger a denial of service (double free) or other unspecified impacts by causing a creation failure.

The Impact of CVE-2018-7480

The vulnerability could enable local users to disrupt the system, potentially leading to a denial of service condition or other undisclosed effects due to a creation failure trigger.

Technical Details of CVE-2018-7480

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

Vulnerability Description

The blkcg_init_queue function in block/blk-cgroup.c in the Linux kernel before 4.11 allows local users to cause a denial of service (double free) or possibly have unspecified other impact by triggering a creation failure.

Affected Systems and Versions

Affected versions: Linux kernel versions prior to 4.11
Systems running Linux kernel versions before 4.11 are vulnerable to this issue.

Exploitation Mechanism

Local users can exploit the vulnerability by triggering a creation failure, leading to a denial of service or other potential impacts.

Mitigation and Prevention

Protecting systems from CVE-2018-7480 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to a patched version of the Linux kernel (4.11 or newer) to mitigate the vulnerability.
Monitor for any unusual system behavior that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to ensure all security patches are applied.
Implement the principle of least privilege to restrict user access and minimize the impact of potential vulnerabilities.

Patching and Updates

Stay informed about security advisories and patches released by Linux distributions and the kernel development team.
Apply patches promptly to address known vulnerabilities and enhance system security.