High severity · published May 28, 2026
CVE-2026-46174
x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
8.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
3.16.58 before 3.17; 4.4.144 before 4.5; 4.9.102 before 4.10; 4.14.1 before 5.10.256; 5.11 before 5.15.207; 5.16 before 6.1.173; +15 more · source: NVD
LI
Linux · Linux
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 1e23b30a80b14e5764657401ee2cca030525ae8e; f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before f5bc3aef7df46eaaf423d7413ab8833f704ae576; f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 251497955f2314cd39d43191e81c6151dead4c7b; f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before ff6fc65b3bf73acc5ee71919154d830ad5431362; f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 9109489cc8c34e50d15575a3d1ff82af586bc1aa; f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 28f5ed477eef166d678d6966762cbc1de9b4f436; +9 more · source: vendor
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46174
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46174
Patch
https://git.kernel.org/stable/c/1cd85a19748b2407830376a5cbae5c0f126016e5
Patch
https://git.kernel.org/stable/c/1e23b30a80b14e5764657401ee2cca030525ae8e
Patch
https://git.kernel.org/stable/c/251497955f2314cd39d43191e81c6151dead4c7b
Patch
https://git.kernel.org/stable/c/28f5ed477eef166d678d6966762cbc1de9b4f436
Patch
https://git.kernel.org/stable/c/9109489cc8c34e50d15575a3d1ff82af586bc1aa
Patch
https://git.kernel.org/stable/c/c21b90f77687075115d989e53a8ec5e2bb427ab1
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