---
title: "CVE-2026-89826: Linux Kernel - Buffer Overflow"
description: "Linux kernel contains a buffer overflow caused by integer overflow in drm/panthor firmware build-info bounds checks, letting attackers trigger out-of-bounds reads, exploit requires crafted firmware image."
url: https://panop.io/threat-heartbeat/CVE-2026-89826/
---

# CVE-2026-89826 Linux Kernel - Buffer Overflow

Linux kernel contains a buffer overflow caused by integer overflow in drm/panthor firmware build-info bounds checks, letting attackers trigger out-of-bounds reads, exploit requires crafted firmware image.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89826)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Information Disclosure

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix for drm/panthor firmware bounds checks.

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-2026-89826](https://nvd.nist.gov/vuln/detail/CVE-2026-89826)
- [https://git.kernel.org/stable/c/5516f1acfd07564361cf306cc90a8e513df0f096](https://git.kernel.org/stable/c/5516f1acfd07564361cf306cc90a8e513df0f096)
- [https://git.kernel.org/stable/c/6ae19dce3e8c13ae73590b3f4311abe9f96bbae8](https://git.kernel.org/stable/c/6ae19dce3e8c13ae73590b3f4311abe9f96bbae8)
- [https://git.kernel.org/stable/c/8321b093fa6c297b80586460ce6914d9655df170](https://git.kernel.org/stable/c/8321b093fa6c297b80586460ce6914d9655df170)

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## 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.

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