CVE-2018-10876 Explained : Impact and Mitigation

In the ext4 filesystem code of the Linux kernel, a vulnerability has been discovered that could lead to a use-after-free scenario. This vulnerability affects the ext4_ext_remove_space() function during the handling of a specially crafted ext4 image.

Understanding CVE-2018-10876

This CVE entry pertains to a vulnerability in the Linux kernel's ext4 filesystem code that could be exploited to trigger a use-after-free scenario.

What is CVE-2018-10876?

The vulnerability in the ext4 filesystem code of the Linux kernel allows for a use-after-free scenario to occur in the ext4_ext_remove_space() function when processing a specially crafted ext4 image.

The Impact of CVE-2018-10876

The impact of this vulnerability is rated as MEDIUM severity with a CVSS base score of 5. It requires local access and user interaction to exploit, with a high impact on availability.

Technical Details of CVE-2018-10876

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows for a use-after-free scenario in the ext4_ext_remove_space() function of the Linux kernel's ext4 filesystem code.

Affected Systems and Versions

Product: Kernel
Vendor: [UNKNOWN]
Versions: Not applicable (n/a)

Exploitation Mechanism

The vulnerability can be exploited by handling a specially crafted ext4 image during the mounting and operation process.

Mitigation and Prevention

To address CVE-2018-10876, follow these mitigation strategies:

Immediate Steps to Take

Apply patches provided by the vendor
Monitor vendor advisories for updates

Long-Term Security Practices

Regularly update and patch systems
Implement least privilege access controls

Patching and Updates

Refer to vendor advisories for patch availability and installation instructions