CVE-2026-46174 (GCVE-0-2026-46174)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-08-05 12:30
VLAI
Title
x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
Summary
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.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 1e23b30a80b14e5764657401ee2cca030525ae8e (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < f5bc3aef7df46eaaf423d7413ab8833f704ae576 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 251497955f2314cd39d43191e81c6151dead4c7b (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < ff6fc65b3bf73acc5ee71919154d830ad5431362 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 9109489cc8c34e50d15575a3d1ff82af586bc1aa (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 28f5ed477eef166d678d6966762cbc1de9b4f436 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 1cd85a19748b2407830376a5cbae5c0f126016e5 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < c21b90f77687075115d989e53a8ec5e2bb427ab1 (git)
Affected: 5abd1583e06b3963e5c9d915760367de86808b78 (git)
Affected: 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (git)
Affected: 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (git)
Affected: 3.16.58 , < 3.17 (semver)
Affected: 4.4.144 , < 4.5 (semver)
Affected: 4.9.102 , < 4.10 (semver)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.256 , ≤ 5.10.* (semver)
Unaffected: 5.15.207 , ≤ 5.15.* (semver)
Unaffected: 6.1.173 , ≤ 6.1.* (semver)
Unaffected: 6.6.139 , ≤ 6.6.* (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
Create a notification for this product.
Show details on NVD website
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way.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/x86/include/asm/msr-index.h\",\"arch/x86/kernel/cpu/amd.c\",\"tools/arch/x86/include/asm/msr-index.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"1e23b30a80b14e5764657401ee2cca030525ae8e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"f5bc3aef7df46eaaf423d7413ab8833f704ae576\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"251497955f2314cd39d43191e81c6151dead4c7b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"ff6fc65b3bf73acc5ee71919154d830ad5431362\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"9109489cc8c34e50d15575a3d1ff82af586bc1aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"28f5ed477eef166d678d6966762cbc1de9b4f436\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"1cd85a19748b2407830376a5cbae5c0f126016e5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9\",\"lessThan\":\"c21b90f77687075115d989e53a8ec5e2bb427ab1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5abd1583e06b3963e5c9d915760367de86808b78\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ba461d426490b6ed7e8298c4d3b7a13aa5d2686\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5a63725cd18fcee2af6ec46ccb856b64ad3077b4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3.16.58\",\"lessThan\":\"3.17\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.4.144\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.102\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/x86/include/asm/msr-index.h\",\"arch/x86/kernel/cpu/amd.c\",\"tools/arch/x86/include/asm/msr-index.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.256\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.207\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.173\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.139\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.88\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.30\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.7\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-14T14:07:44+00:00",
      "cve": "CVE-2026-46174",
      "id": "CVE-2026-46174",
      "initial_release_date": "2026-05-28T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2\u0027s op cache",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46174.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-06T01:17:40Z",
      "cve": "CVE-2026-46174",
      "id": "CVE-2026-46174",
      "initial_release_date": "2026-05-29T01:15:47Z",
      "product_status:first_fixed": "89",
      "product_status:known_affected": "91",
      "product_status:known_not_affected": "204",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46174",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46174.json",
      "version": "8"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.