CVE-2018-19985 : What You Need to Know

The hso_get_config_data function in the Linux kernel up to version 4.19.8 has a vulnerability that could lead to an out-of-bounds read, potentially enabling arbitrary reads within the kernel's address space.

Understanding CVE-2018-19985

This CVE involves a function in the Linux kernel that mishandles data from a USB device, leading to a potential security risk.

What is CVE-2018-19985?

The hso_get_config_data function in the Linux kernel up to version 4.19.8 reads if_num from a USB device as a u8 data type and uses it to access an array, resulting in an out-of-bounds read vulnerability.

The Impact of CVE-2018-19985

The vulnerability may allow attackers to perform arbitrary reads within the kernel's address space, potentially leading to unauthorized access or information disclosure.

Technical Details of CVE-2018-19985

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

Vulnerability Description

The hso_get_config_data function in drivers/net/usb/hso.c in the Linux kernel through 4.19.8 reads if_num from the USB device as a u8 and uses it to index a small array, resulting in an out-of-bounds read.

Affected Systems and Versions

Linux kernel versions up to 4.19.8

Exploitation Mechanism

The vulnerability arises from mishandling data retrieved from a USB device, allowing for an out-of-bounds read that could be exploited by attackers.

Mitigation and Prevention

Protecting systems from CVE-2018-19985 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security updates provided by Linux distributions promptly
Monitor vendor advisories for patches and guidance

Long-Term Security Practices

Regularly update and patch the Linux kernel and related components
Implement strong access controls and monitoring mechanisms

Patching and Updates

Update the Linux kernel to a version that includes a fix for CVE-2018-19985