---
id: CVE-2026-46174
title: 'x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2''s op cache'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache

  Make sure resources are not improperly shared in the op cache and
  cause instruction corr…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    1e23b30a80b14e5764657401ee2cca030525ae8e
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    f5bc3aef7df46eaaf423d7413ab8833f704ae576
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    251497955f2314cd39d43191e81c6151dead4c7b
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    ff6fc65b3bf73acc5ee71919154d830ad5431362
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    9109489cc8c34e50d15575a3d1ff82af586bc1aa
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    28f5ed477eef166d678d6966762cbc1de9b4f436
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    1cd85a19748b2407830376a5cbae5c0f126016e5
  - >-
    Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 <
    c21b90f77687075115d989e53a8ec5e2bb427ab1
  - Linux 5abd1583e06b3963e5c9d915760367de86808b78
  - Linux 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686
  - Linux 5a63725cd18fcee2af6ec46ccb856b64ad3077b4
  - Linux >= 3.16.58 < 3.17
  - Linux >= 4.4.144 < 4.5
  - Linux >= 4.9.102 < 4.10
  - Linux 4.14
published: '2026-05-28'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:49:23.340Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-46174'
references:
  - url: 'https://git.kernel.org/stable/c/1e23b30a80b14e5764657401ee2cca030525ae8e'
  - url: 'https://git.kernel.org/stable/c/f5bc3aef7df46eaaf423d7413ab8833f704ae576'
  - url: 'https://git.kernel.org/stable/c/251497955f2314cd39d43191e81c6151dead4c7b'
  - url: 'https://git.kernel.org/stable/c/ff6fc65b3bf73acc5ee71919154d830ad5431362'
  - url: 'https://git.kernel.org/stable/c/9109489cc8c34e50d15575a3d1ff82af586bc1aa'
  - url: 'https://git.kernel.org/stable/c/28f5ed477eef166d678d6966762cbc1de9b4f436'
  - url: 'https://git.kernel.org/stable/c/1cd85a19748b2407830376a5cbae5c0f126016e5'
  - url: 'https://git.kernel.org/stable/c/c21b90f77687075115d989e53a8ec5e2bb427ab1'
tags:
  - cve.org
epss: 0.00135
epssPercentile: 0.03343
ingestedAt: '2026-09-08T15:33:26.988Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache

Make sure resources are not improperly shared in the op cache and
cause instruction corruption this way.

## Affected

- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < 1e23b30a80b14e5764657401ee2cca030525ae8e`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < f5bc3aef7df46eaaf423d7413ab8833f704ae576`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < 251497955f2314cd39d43191e81c6151dead4c7b`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < ff6fc65b3bf73acc5ee71919154d830ad5431362`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < 9109489cc8c34e50d15575a3d1ff82af586bc1aa`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < 28f5ed477eef166d678d6966762cbc1de9b4f436`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < 1cd85a19748b2407830376a5cbae5c0f126016e5`
- `Linux >= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 < c21b90f77687075115d989e53a8ec5e2bb427ab1`
- `Linux 5abd1583e06b3963e5c9d915760367de86808b78`
- `Linux 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686`
- `Linux 5a63725cd18fcee2af6ec46ccb856b64ad3077b4`
- `Linux >= 3.16.58 < 3.17`
- `Linux >= 4.4.144 < 4.5`
- `Linux >= 4.9.102 < 4.10`
- `Linux 4.14`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.