---
title: "CVE-2026-89947: Linux Kernel - Out of Bounds Read"
description: "Linux kernel contains a global out-of-bounds read caused by a mismatch in the number of parents for gxbb_32k_clk_sel clock mux in the meson clk driver, letting local attackers cause memory corruption, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-89947/
---

# CVE-2026-89947 Linux Kernel - Out of Bounds Read

Linux kernel contains a global out-of-bounds read caused by a mismatch in the number of parents for gxbb\_32k\_clk\_sel clock mux in the meson clk driver, letting local attackers cause memory corruption, exploit requires kernel-level access.

CVSS base score 8.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89947)

## Details

Type

Out of Bounds Read

Impact

Denial Of Service

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the Linux kernel version including commit 7915d7d5407c or later.

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-2026-89947](https://nvd.nist.gov/vuln/detail/CVE-2026-89947)
- [https://git.kernel.org/stable/c/c86214e6178c38a0eff39110a4e92b824f5dd403](https://git.kernel.org/stable/c/c86214e6178c38a0eff39110a4e92b824f5dd403)
- [https://git.kernel.org/stable/c/f6ff0e6995dbff5cb145d7795c8f0af9c168094a](https://git.kernel.org/stable/c/f6ff0e6995dbff5cb145d7795c8f0af9c168094a)
- [https://git.kernel.org/stable/c/1e509a6707d2fd9da79bdfa24742661b34562bfd](https://git.kernel.org/stable/c/1e509a6707d2fd9da79bdfa24742661b34562bfd)
- [https://git.kernel.org/stable/c/404079d124d75a5da16322acc53d3ffc50b4ec68](https://git.kernel.org/stable/c/404079d124d75a5da16322acc53d3ffc50b4ec68)
- [https://git.kernel.org/stable/c/4582949b7badcb91bb537ca522d69b8a35131e72](https://git.kernel.org/stable/c/4582949b7badcb91bb537ca522d69b8a35131e72)
- [https://git.kernel.org/stable/c/628b6fee9fca292f12d07f0f1bcf1edefa949d81](https://git.kernel.org/stable/c/628b6fee9fca292f12d07f0f1bcf1edefa949d81)
- [https://git.kernel.org/stable/c/8b2f7a411e7ceaef268355c2150c22ee3f509c3b](https://git.kernel.org/stable/c/8b2f7a411e7ceaef268355c2150c22ee3f509c3b)
- [https://git.kernel.org/stable/c/bf85bd6e550c17ffa585606fcc18eb5b7c95bbce](https://git.kernel.org/stable/c/bf85bd6e550c17ffa585606fcc18eb5b7c95bbce)

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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

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