CVE-2026-46174

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

State: Published
Severity: 8.8 High
Published: May 28, 2026
Updated: Oct 19, 2026
Reserved: May 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
LinuxLinux	f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 1e23b30a80b14e5764657401ee2cca030525ae8eAffected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before f5bc3aef7df46eaaf423d7413ab8833f704ae576Affected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 251497955f2314cd39d43191e81c6151dead4c7bAffected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before ff6fc65b3bf73acc5ee71919154d830ad5431362Affected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 9109489cc8c34e50d15575a3d1ff82af586bc1aaAffected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 28f5ed477eef166d678d6966762cbc1de9b4f436Affected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 1cd85a19748b2407830376a5cbae5c0f126016e5Affected f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before c21b90f77687075115d989e53a8ec5e2bb427ab1Affected 5abd1583e06b3963e5c9d915760367de86808b78Affected 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686Affected 5a63725cd18fcee2af6ec46ccb856b64ad3077b4Affected 3.16.58 to before 3.17Affected 4.4.144 to before 4.5Affected 4.9.102 to before 4.10Affected
LinuxLinux	4.14Affected before 4.14Not affected 5.10.256 through 5.10.Not affected 5.15.207 through 5.15.Not affected 6.1.173 through 6.1.Not affected 6.6.139 through 6.6.Not affected 6.12.88 through 6.12.Not affected 6.18.30 through 6.18.Not affected 7.0.7 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 1e23b30a80b14e5764657401ee2cca030525ae8eAffected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before f5bc3aef7df46eaaf423d7413ab8833f704ae576Affected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 251497955f2314cd39d43191e81c6151dead4c7bAffected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before ff6fc65b3bf73acc5ee71919154d830ad5431362Affected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 9109489cc8c34e50d15575a3d1ff82af586bc1aaAffected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 28f5ed477eef166d678d6966762cbc1de9b4f436Affected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before 1cd85a19748b2407830376a5cbae5c0f126016e5Affected
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 to before c21b90f77687075115d989e53a8ec5e2bb427ab1Affected
5abd1583e06b3963e5c9d915760367de86808b78Affected
4ba461d426490b6ed7e8298c4d3b7a13aa5d2686Affected
5a63725cd18fcee2af6ec46ccb856b64ad3077b4Affected
3.16.58 to before 3.17Affected
4.4.144 to before 4.5Affected
4.9.102 to before 4.10Affected

LinuxLinux

4.14Affected
before 4.14Not affected
5.10.256 through 5.10.*Not affected
5.15.207 through 5.15.*Not affected
6.1.173 through 6.1.*Not affected
6.6.139 through 6.6.*Not affected
6.12.88 through 6.12.*Not affected
6.18.30 through 6.18.*Not affected
7.0.7 through 7.0.*Not affected
7.1 and laterNot affected

References

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