---
title: "CVE-2026-23789: Samsung Exynos - Use After Free"
description: "Samsung Mobile Processor and Wearable Processor Exynos series contain a double-free vulnerability caused by improper cleanup of dma_buf references in the Exynos MFC encoder driver, letting attackers cause kernel memory corruption and potentially execute arbitrary code, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-23789/
---

# CVE-2026-23789 Samsung Exynos - Use After Free

Samsung Mobile Processor and Wearable Processor Exynos series contain a double-free vulnerability caused by improper cleanup of dma\_buf references in the Exynos MFC encoder driver, letting attackers cause kernel memory corruption and potentially execute arbitrary code, exploit requires kernel-level access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.11% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-23789)

## Details

Type

Use After Free

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-415](https://cwe.mitre.org/data/definitions/415.html)

## Vendor fix

Update to the latest firmware or kernel version provided by Samsung that addresses this issue.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-23789](https://nvd.nist.gov/vuln/detail/CVE-2026-23789)
- [https://semiconductor.samsung.com/support/quality-support/product-security-updates/](https://semiconductor.samsung.com/support/quality-support/product-security-updates/)
- [https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2026-23789/](https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2026-23789/)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)