CVE-2024-0775: What You Need to Know

This CVE record involves a kernel vulnerability related to a use-after-free flaw found in the Linux kernel's __ext4_remount function, potentially leading to an information leak problem. The vulnerability has a moderate severity rating and affects certain versions of Red Hat Enterprise Linux.

Understanding CVE-2024-0775

A use-after-free flaw was discovered in the __ext4_remount function in ext4 in the Linux kernel, allowing a local user to trigger an information leak issue during the freeing process of old quota file names before a potential failure which can result in a use-after-free scenario.

What is CVE-2024-0775?

CVE-2024-0775 is a kernel vulnerability that arises from a use-after-free flaw in the __ext4_remount function in ext4 in the Linux kernel. This flaw can be exploited by a local user to cause an information leak issue, potentially leading to a use-after-free condition.

The Impact of CVE-2024-0775

The impact of CVE-2024-0775 is considered moderate. If exploited, this vulnerability could allow a local user to leak sensitive information, leading to a use-after-free scenario and potentially compromising the affected system's confidentiality, integrity, and availability.

Technical Details of CVE-2024-0775

This section provides detailed technical information about the vulnerability, including its description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability is a use-after-free flaw found in the __ext4_remount function in ext4 in the Linux kernel. It allows a local user to trigger an information leak problem during the freeing of old quota file names before a potential failure, resulting in a use-after-free scenario.

Affected Systems and Versions

Affected Vendor: Red Hat
Affected Products:
Red Hat Enterprise Linux 6 (Unaffected)
Red Hat Enterprise Linux 7 (Unaffected)
Red Hat Enterprise Linux 8 (Unaffected)
Red Hat Enterprise Linux 9 (Affected)
Fedora (Unaffected)
Vulnerable Versions: Multiple versions of Red Hat Enterprise Linux 9

Exploitation Mechanism

The use-after-free vulnerability in the __ext4_remount function in ext4 can be exploited by a local user to trigger an information leak issue, potentially leading to a use-after-free scenario.

Mitigation and Prevention

In response to CVE-2024-0775, it is crucial to implement immediate steps to mitigate the risk, adopt long-term security practices, and ensure timely patching and updates to address the vulnerability.

Immediate Steps to Take

Monitor security advisories from Red Hat for patches and updates related to CVE-2024-0775.
Limit user access and privileges on vulnerable systems to mitigate potential exploitation by local users.

Long-Term Security Practices

Implement security best practices, such as regular security assessments and code reviews, to detect and address vulnerabilities early.
Educate users on safe computing practices to minimize the risk of exploitation of known vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Red Hat for the affected versions of Red Hat Enterprise Linux to remediate CVE-2024-0775.
Regularly check for new releases and security advisories from Red Hat to stay informed about potential security risks and updates.