CVE-2026-46076

HIGHPre-NVD 7.97.9—
EchelonGraph scoreMEDIUM confidence

Score 7.9 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. the CNA's CVSS baseline 7.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.9Exploit: None knownExposed: 0

A fix is available — apply it.

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

KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1

Explicitly synthesize a #UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nested_svm_l2_tlb_flush_enabled() is true, and the hypercall is something other than one of the supported Hyper-V hypercalls. When all of the above conditions are met, KVM will intercept VMMCALL but never forward it to L1, i.e. will let L2 make hypercalls as if it were L1.

The TLFS says a whole lot of nothing about this scenario, so go with the architectural behavior, which says that VMMCALL #UDs if it's not intercepted.

Opportunistically do a 2-for-1 stub trade by stub-ifying the new API instead of the helpers it uses. The last remaining "single" stub will soon be dropped as well.

[sean: rewrite changelog and comment, tag for stable, remove defunct stubs]

CVSS v3
7.9
EG Score
7.9(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity79% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

May 27, 2026

Last Modified

August 5, 2026

Advisory Details (4)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic

KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c36991c6f8d2ab56ee67aff04e3c357f45cfc76c
generic

KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/924d721fae95687acedbaf624a094ed0e8b67104
generic

KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5fb4a5f361565f5b629d8a8fe5288ce8463c5727
generic

KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/009c0f726abeaa67aad1d96b883bdce01d405ce2

Vendor Advisories for CVE-2026-46076(2)

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

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-25ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-25ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-25ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-25ubuntu

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.86-1~bpo12+1 (19 versions)6.12.86-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (131 versions)7.0.4-1—

All Vendor Advisories

(20)

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 5× in last 7d / 84× 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 250 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-46076?
CVE-2026-46076 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a #UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflush_enabled() is true, and the hypercall is something…
When was CVE-2026-46076 disclosed?
CVE-2026-46076 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46076 actively exploited?
CVE-2026-46076 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 97.8% of all scored CVEs.
What is the CVSS score of CVE-2026-46076?
CVE-2026-46076 has a CVSS v4.0 base score of 7.9 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46076?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46076, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-46076

Explore →

Is Your Infrastructure Affected by CVE-2026-46076?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs