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

> A flaw in the Linux kernel udmabuf driver allows local attackers to escalate privileges and execute arbitrary code via improper array index validation.

- **Severity:** High 8.2 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Apr 2023
- **Updated:** 10 Aug 2026
- **Also known as:** AZL-26280, DEBIAN-CVE-2023-2008, GHSA-qvq2-2xfw-f6x6, UBUNTU-CVE-2023-2008

## 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 (Improper Validation of Array Index)

## Which versions are affected by CVE-2023-2008?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2023-2008?

Apply the vendor's patch.

## 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:

- Proof of concept code for CVE-2023-2008 (github_poc): https://github.com/bluefrostsecurity/CVE-2023-2008

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2008 and fix it if it is affected.

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

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-2008/ (Markdown: https://insights.sbomify.com/CVE-2023-2008/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2008
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2008
- OSV: https://osv.dev/vulnerability/CVE-2023-2008

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2008/
Summaries are generated and may contain mistakes; the official description above is the record.