CVE-2026-46174x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
Updated under an hour ago ()
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It affects Linux and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 1e23b30a80b14e5764657401ee2cca030525ae8e; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before f5bc3aef7df46eaaf423d7413ab8833f704ae576; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 251497955f2314cd39d43191e81c6151dead4c7b; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before ff6fc65b3bf73acc5ee71919154d830ad5431362; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 9109489cc8c34e50d15575a3d1ff82af586bc1aa; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 28f5ed477eef166d678d6966762cbc1de9b4f436; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 1cd85a19748b2407830376a5cbae5c0f126016e5; from f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before c21b90f77687075115d989e53a8ec5e2bb427ab1; and 6 more ranges | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.16.58 before 3.17; from 4.4.144 before 4.5; from 4.9.102 before 4.10; from 4.14.1 before 5.10.256; from 5.11 before 5.15.207; from 5.16 before 6.1.173; from 6.2 before 6.6.139; from 6.7 before 6.12.88; and 13 more ranges | NVD |
References
- https://git.kernel.org/stable/c/1e23b30a80b14e5764657401ee2cca030525ae8epatch
- https://git.kernel.org/stable/c/f5bc3aef7df46eaaf423d7413ab8833f704ae576patch
- https://git.kernel.org/stable/c/251497955f2314cd39d43191e81c6151dead4c7bpatch
- https://git.kernel.org/stable/c/ff6fc65b3bf73acc5ee71919154d830ad5431362patch
- https://git.kernel.org/stable/c/9109489cc8c34e50d15575a3d1ff82af586bc1aapatch
- https://git.kernel.org/stable/c/28f5ed477eef166d678d6966762cbc1de9b4f436patch
- https://git.kernel.org/stable/c/1cd85a19748b2407830376a5cbae5c0f126016e5patch
- https://git.kernel.org/stable/c/c21b90f77687075115d989e53a8ec5e2bb427ab1patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.