Public vulnerability disclosure
CVE-2026-46174
x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
publishedCWE-862
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.
Technical severity8.8 highCVSS 3.1 · CNA: Linux
Published2026-05-28Source updated 2026-11-10
Collected2026-11-102 attributed sources
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < 1e23b30a80b14e5764657401ee2cca030525ae8e (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < f5bc3aef7df46eaaf423d7413ab8833f704ae576 (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < 251497955f2314cd39d43191e81c6151dead4c7b (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < ff6fc65b3bf73acc5ee71919154d830ad5431362 (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < 9109489cc8c34e50d15575a3d1ff82af586bc1aa (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < 28f5ed477eef166d678d6966762cbc1de9b4f436 (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < 1cd85a19748b2407830376a5cbae5c0f126016e5 (affected, git) ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9; < c21b90f77687075115d989e53a8ec5e2bb427ab1 (affected, git) 5abd1583e06b3963e5c9d915760367de86808b78 (affected, git) 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (affected, git) 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (affected, git) ≥ 3.16.58; < 3.17 (affected, semver) ≥ 4.4.144; < 4.5 (affected, semver) ≥ 4.9.102; < 4.10 (affected, semver) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
4.14 (affected) ≥ 0; < 4.14 (unaffected, semver) ≥ 5.10.256; ≤ 5.10.* (unaffected, semver) ≥ 5.15.207; ≤ 5.15.* (unaffected, semver) ≥ 6.1.173; ≤ 6.1.* (unaffected, semver) ≥ 6.6.139; ≤ 6.6.* (unaffected, semver) ≥ 6.12.88; ≤ 6.12.* (unaffected, semver) ≥ 6.18.30; ≤ 6.18.* (unaffected, semver) ≥ 7.0.7; ≤ 7.0.* (unaffected, semver) ≥ 7.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.8 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | CNA: Linux |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/1e23b30a80b14e5764657401ee2cca030525ae8eCNA: Linux
- https://git.kernel.org/stable/c/f5bc3aef7df46eaaf423d7413ab8833f704ae576CNA: Linux
- https://git.kernel.org/stable/c/251497955f2314cd39d43191e81c6151dead4c7bCNA: Linux
- https://git.kernel.org/stable/c/ff6fc65b3bf73acc5ee71919154d830ad5431362CNA: Linux
- https://git.kernel.org/stable/c/9109489cc8c34e50d15575a3d1ff82af586bc1aaCNA: Linux
- https://git.kernel.org/stable/c/28f5ed477eef166d678d6966762cbc1de9b4f436CNA: Linux
- https://git.kernel.org/stable/c/1cd85a19748b2407830376a5cbae5c0f126016e5CNA: Linux
- https://git.kernel.org/stable/c/c21b90f77687075115d989e53a8ec5e2bb427ab1CNA: Linux
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlADP: siemens-SADP
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.