Core Linux kernel vulnerability with potential RCE; widely used infrastructure; CVSS 8.8.
CVE-2026-46174
RCE in Linux kernel via AMD Zen2 op-cache isolation
Is CVE-2026-46174 being exploited?
Not confirmed. CVE-2026-46174 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-46174?
CVE-2026-46174 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-46174?
Yes. A fix has been recorded for CVE-2026-46174. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-46174 affect?
CVE-2026-46174 affects Linux kernel (x86 AMD Zen2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-46174?
Update to patched kernel release
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution by exploiting shared op-cache resources to corrupt instructions.
Patch when possible
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < 1e23b30a80b14e5764657401ee2cca030525ae8e
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < f5bc3aef7df46eaaf423d7413ab8833f704ae576
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < 251497955f2314cd39d43191e81c6151dead4c7b
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < ff6fc65b3bf73acc5ee71919154d830ad5431362
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < 9109489cc8c34e50d15575a3d1ff82af586bc1aa
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < 28f5ed477eef166d678d6966762cbc1de9b4f436
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < 1cd85a19748b2407830376a5cbae5c0f126016e5
- affected>= f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 and < c21b90f77687075115d989e53a8ec5e2bb427ab1
- affected5abd1583e06b3963e5c9d915760367de86808b78
- affected4ba461d426490b6ed7e8298c4d3b7a13aa5d2686
- affected5a63725cd18fcee2af6ec46ccb856b64ad3077b4
- affected>= 3.16.58 and < 3.17
- affected>= 4.4.144 and < 4.5
- affected>= 4.9.102 and < 4.10
- affected4.14
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.