CVE-2023-2008 Kernel: udmabuf: improper validation of array index leading to local privilege escalation

What is CVE-2023-2008?

CVE-2023-2008 is a high-severity memory corruption vulnerability in Linux kernel, published on 14 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Weakness: CWE-129

Which versions are affected by CVE-2023-2008?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-2008?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-2008 being exploited?

There is no known exploitation of CVE-2023-2008 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-26280, DEBIAN-CVE-2023-2008, GHSA-qvq2-2xfw-f6x6, UBUNTU-CVE-2023-2008.