CVE-2023-2008 is a high-severity vulnerability (CVSS score of 7.8) found in the Linux kernel's udmabuf device driver. This flaw results from improper validation of user-supplied data, which can lead to memory access past the end of an array. Attackers can exploit this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. The vulnerability affects various versions of the Linux kernel, impacting a wide range of systems running the Linux operating system.

How do I know if I'm affected?

If you're using a Linux-based system, you might be affected by the vulnerability. To know if you're at risk, check if your Linux kernel version falls within these ranges: 4.20 to 5.4.201, 5.5 to 5.10.126, 5.11 to 5.15.50, 5.16 to 5.18.7, or any of the 5.19 release candidates (rc1, rc2, rc3). If your system is running any of these versions, it's vulnerable to this security flaw, which could allow attackers to escalate privileges and execute arbitrary code in the kernel context.

What should I do if I'm affected?

If you're affected by the vulnerability, it's crucial to update your Linux kernel to a version that contains the fix. First, check your current kernel version by running uname -r in the terminal. If it's within the vulnerable range, update your system's kernel packages. For specific instructions, refer to your Linux distribution's documentation or contact their support team. Keeping your system up-to-date is essential for maintaining security and preventing potential attacks.

Is CVE-2023-2008 in CISA’s Known Exploited Vulnerabilities Catalog?

Yes, it is in CISA's Known Exploited Vulnerabilities Catalog. The vulnerability was added to the catalog recently, but no specific due date or required action is mentioned.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as CWE-129, which describes a flaw in the Linux kernel's udmabuf device driver, which can be exploited to escalate privileges due to improper validation of array index. This vulnerability affects certain Linux Kernel versions and has a high impact on affected systems.

For more details

CVE-2023-2008 is a significant vulnerability in the Linux kernel's udmabuf device driver, posing a risk to various systems. By addressing this flaw, users can prevent potential privilege escalation and arbitrary code execution. For a comprehensive understanding of the vulnerability, including its description, severity, technical details, and affected software configurations, consult the NVD page or the links below.

• Red Hat Bugzilla Report

• Linux Kernel Patch on GitHub

• NetApp Security Advisory

• Zero Day Initiative Advisory