CVE-2026-64284

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. 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: x86: Ensure vendor's exit handler runs before fastpath userspace exits

Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains control of the vCPU. E.g. for VMX (and soon to be for SVM as well), KVM needs to flush the PML buffer prior to exiting to userspace, otherwise any memory written by the final KVM_RUN might never be flagged as dirty.

Note, waiting to snapshot CR0 and CR3 until svm_handle_exit() is flawed in general, as that risks consuming stale state in a fastpath handler. That will be addressed in a future change.

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 25, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f2ca2b5326211bd38490f0497eb583721ce0bbc0
generic

KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b3436d9b9b1affe1c3191ac9831308923f5f03c3
generic

KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4ad73ef0e7966ecfe67de0060537b4cb14d9acd4
generic

KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ffedf43910e44b76c2c1db4e9fbf12b268190c1

Vendor Advisories for CVE-2026-64284(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-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-09-18ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)6.12.96-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (158 versions)7.1.4-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

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 27× in last 7d / 100× 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 213 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64284?
CVE-2026-64284 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains…
When was CVE-2026-64284 disclosed?
CVE-2026-64284 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64284 actively exploited?
CVE-2026-64284 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 97.3% of all scored CVEs.
What is the CVSS score of CVE-2026-64284?
CVE-2026-64284 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-64284?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64284, 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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