CVE-2026-64172

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235)

Hygon Family 18h CPUs are derived from AMD Family 17h (Zen1) silicon and share the same erratum #1235: hardware may read a stale IsRunning=1 bit during ICR write emulation and silently fail to generate an AVIC_IPI_FAILURE_TARGET_NOT_RUNNING VM-Exit on the sending vCPU.

The absence of the VM-Exit causes KVM to miss the required wakeup of blocking target vCPUs, leading to hung vCPUs and unbounded delays in guest execution.

Extend the existing AMD Family 17h erratum #1235 workaround to also cover Hygon Family 18h. With IPI virtualization disabled, KVM never sets IsRunning=1 in the Physical ID table, so every non-self IPI generates a VM-Exit and is correctly emulated.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235) - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9a12fa5213cfc391e0eed63902d3be98f0913765
generic

KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235) - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9560e6fee887a9594a89fa265b5b9c79b1591803
generic

KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235) - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/94ade38f317ea086a181db0e6b69c574b3b70a5e

Vendor Advisories for CVE-2026-64172(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (138 versions)7.0.12-1—

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 29× in last 7d / 156× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 552 total refreshes for this CVE.

  1. 2026-08-30 02:44 UTCEG score recompute
  2. 2026-08-30 02:44 UTCVendor advisory
  3. 2026-08-30 02:44 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-28 02:39 UTCEG score recompute
  7. 2026-08-28 02:39 UTCVendor advisory
  8. 2026-08-28 02:39 UTCGHSA enrichment
  9. 2026-08-27 13:44 UTCVendor advisory
  10. 2026-08-27 13:44 UTCGHSA enrichment
  11. 2026-08-27 00:40 UTCEG score recompute
  12. 2026-08-27 00:40 UTCVendor advisory
  13. 2026-08-27 00:40 UTCGHSA enrichment
  14. 2026-08-26 14:46 UTCEPSS rescore
  15. 2026-08-26 11:41 UTCVendor advisory
  16. 2026-08-26 11:41 UTCGHSA enrichment
  17. 2026-08-25 22:43 UTCEG score recompute
  18. 2026-08-25 22:43 UTCVendor advisory
  19. 2026-08-25 22:43 UTCGHSA enrichment
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-25 08:39 UTCVendor advisory
  22. 2026-08-25 08:39 UTCGHSA enrichment
  23. 2026-08-24 19:43 UTCEG score recompute
  24. 2026-08-24 19:43 UTCVendor advisory
  25. 2026-08-24 19:43 UTCGHSA enrichment
Show 75 more
  1. 2026-08-24 06:47 UTCVendor advisory
  2. 2026-08-24 06:47 UTCGHSA enrichment
  3. 2026-08-23 17:51 UTCVendor advisory
  4. 2026-08-23 17:51 UTCGHSA enrichment
  5. 2026-08-23 04:56 UTCEG score recompute
  6. 2026-08-23 04:56 UTCVendor advisory
  7. 2026-08-23 04:56 UTCGHSA enrichment
  8. 2026-08-23 00:19 UTCEPSS rescore
  9. 2026-08-22 16:00 UTCVendor advisory
  10. 2026-08-22 16:00 UTCGHSA enrichment
  11. 2026-08-22 03:04 UTCEG score recompute
  12. 2026-08-22 03:04 UTCVendor advisory
  13. 2026-08-22 03:03 UTCGHSA enrichment
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 14:05 UTCVendor advisory
  16. 2026-08-21 14:05 UTCGHSA enrichment
  17. 2026-08-21 01:09 UTCEG score recompute
  18. 2026-08-21 01:09 UTCVendor advisory
  19. 2026-08-21 01:09 UTCGHSA enrichment
  20. 2026-08-20 22:55 UTCEPSS rescore
  21. 2026-08-20 12:14 UTCVendor advisory
  22. 2026-08-20 12:14 UTCGHSA enrichment
  23. 2026-08-19 22:55 UTCEG score recompute
  24. 2026-08-19 22:55 UTCVendor advisory
  25. 2026-08-19 22:55 UTCGHSA enrichment
  26. 2026-08-19 17:04 UTCEPSS rescore
  27. 2026-08-19 08:35 UTCVendor advisory
  28. 2026-08-19 08:35 UTCGHSA enrichment
  29. 2026-08-18 19:40 UTCEG score recompute
  30. 2026-08-18 19:40 UTCVendor advisory
  31. 2026-08-18 19:39 UTCGHSA enrichment
  32. 2026-08-18 13:48 UTCEPSS rescore
  33. 2026-08-17 23:56 UTCEG score recompute
  34. 2026-08-17 23:56 UTCVendor advisory
  35. 2026-08-17 23:56 UTCGHSA enrichment
  36. 2026-08-17 13:47 UTCEPSS rescore
  37. 2026-08-17 11:00 UTCVendor advisory
  38. 2026-08-17 11:00 UTCGHSA enrichment
  39. 2026-08-16 22:05 UTCEG score recompute
  40. 2026-08-16 22:05 UTCVendor advisory
  41. 2026-08-16 22:05 UTCGHSA enrichment
  42. 2026-08-16 14:56 UTCEPSS rescore
  43. 2026-08-16 09:10 UTCEG score recompute
  44. 2026-08-16 09:10 UTCVendor advisory
  45. 2026-08-16 09:10 UTCGHSA enrichment
  46. 2026-08-15 20:14 UTCVendor advisory
  47. 2026-08-15 20:14 UTCGHSA enrichment
  48. 2026-08-15 07:18 UTCEG score recompute
  49. 2026-08-15 07:18 UTCVendor advisory
  50. 2026-08-15 07:18 UTCGHSA enrichment
  51. 2026-08-15 01:30 UTCEPSS rescore
  52. 2026-08-14 17:27 UTCVendor advisory
  53. 2026-08-14 17:27 UTCGHSA enrichment
  54. 2026-08-14 04:32 UTCEG score recompute
  55. 2026-08-14 04:32 UTCVendor advisory
  56. 2026-08-14 04:32 UTCGHSA enrichment
  57. 2026-08-13 22:00 UTCEPSS rescore
  58. 2026-08-13 15:36 UTCEG score recompute
  59. 2026-08-13 15:36 UTCVendor advisory
  60. 2026-08-13 15:36 UTCGHSA enrichment
  61. 2026-08-13 15:10 UTCVendor advisory
  62. 2026-08-13 15:10 UTCGHSA enrichment
  63. 2026-08-13 02:14 UTCEG score recompute
  64. 2026-08-13 02:14 UTCVendor advisory
  65. 2026-08-13 02:14 UTCGHSA enrichment
  66. 2026-08-12 13:51 UTCEPSS rescore
  67. 2026-08-12 13:19 UTCVendor advisory
  68. 2026-08-12 13:19 UTCGHSA enrichment
  69. 2026-08-12 00:23 UTCVendor advisory
  70. 2026-08-12 00:23 UTCGHSA enrichment
  71. 2026-08-11 11:26 UTCEG score recompute
  72. 2026-08-11 11:26 UTCVendor advisory
  73. 2026-08-11 11:26 UTCGHSA enrichment
  74. 2026-08-11 00:00 UTCEPSS rescore
  75. 2026-08-10 22:31 UTCVendor advisory

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-64172?
CVE-2026-64172 is a high vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235) Hygon Family 18h CPUs are derived from AMD Family 17h (Zen1) silicon and share the same erratum #1235: hardware may read a stale IsRunning=1 bit during…
When was CVE-2026-64172 disclosed?
CVE-2026-64172 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64172 actively exploited?
CVE-2026-64172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-64172?
CVE-2026-64172 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-64172?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64172, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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