---
title: "CVE-2026-93178: Linux Kernel - Out of Bounds Read/Write"
description: "Linux kernel contains a buffer bounds issue caused by lack of bounds check on voltage index in SMU7 lookup in drm/amdgpu/pm/powerplay, letting attackers cause denial of service or system instability, exploit requires crafted input from VBIOS-parsed tables."
url: https://panop.io/threat-heartbeat/CVE-2026-93178/
---

# CVE-2026-93178 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains a buffer bounds issue caused by lack of bounds check on voltage index in SMU7 lookup in drm/amdgpu/pm/powerplay, letting attackers cause denial of service or system instability, exploit requires crafted input from VBIOS-parsed tables.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93178)

## Details

Type

Out of Bounds Read/Write

Impact

Denial Of Service

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix applied.

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-2026-93178](https://nvd.nist.gov/vuln/detail/CVE-2026-93178)
- [https://git.kernel.org/stable/c/8a3db9f593b643904c6cc6d8a3f211c84ca6cf8a](https://git.kernel.org/stable/c/8a3db9f593b643904c6cc6d8a3f211c84ca6cf8a)
- [https://git.kernel.org/stable/c/ce0d8e72836c9d3710a160ad848b0f1d096075e3](https://git.kernel.org/stable/c/ce0d8e72836c9d3710a160ad848b0f1d096075e3)
- [https://git.kernel.org/stable/c/d9ef085114d1e3c2c1f869c0bdb275a7b358ce8b](https://git.kernel.org/stable/c/d9ef085114d1e3c2c1f869c0bdb275a7b358ce8b)
- [https://git.kernel.org/stable/c/f925d317d84d401d642e537ea18ee12f67cb6983](https://git.kernel.org/stable/c/f925d317d84d401d642e537ea18ee12f67cb6983)
- [https://git.kernel.org/stable/c/1664327ce797e09e387dc10cbbaa5b8d76558d2c](https://git.kernel.org/stable/c/1664327ce797e09e387dc10cbbaa5b8d76558d2c)
- [https://git.kernel.org/stable/c/3a8a05477cda6c8293e2b629495b42981dcaba32](https://git.kernel.org/stable/c/3a8a05477cda6c8293e2b629495b42981dcaba32)
- [https://git.kernel.org/stable/c/6f08c001fa6e8212930d694540ae8d9d6d3fb58a](https://git.kernel.org/stable/c/6f08c001fa6e8212930d694540ae8d9d6d3fb58a)
- [https://git.kernel.org/stable/c/745297208d31222f916cc04da313cb737b997935](https://git.kernel.org/stable/c/745297208d31222f916cc04da313cb737b997935)

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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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