CVE-2026-43133

HIGHPre-NVD 7.97.9—
EchelonGraph scoreMEDIUM confidence

Score 7.9 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. a secondary CVSS source baseline 7.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
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: Always use vmcb01 in VMLOAD/VMSAVE emulation

Commit cc3ed80ae69f ("KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state") made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code to always use vmcb01.

As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01 instead of the current VMCB.

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
3%
KEV
Not listed

Published

May 6, 2026

Last Modified

September 10, 2026

Advisory Details (7)

Auto-updated May 20, 2026
No patch confirmed yet.
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5
generic

KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64

Vendor Advisories for CVE-2026-43133(2)

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

Patch Availability(26)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:5.14.0-687.46.1.el9_82026-09-10redhat
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-09-10ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-09-10ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-10ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-10ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-10ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-10ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-09-10ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-09-10ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-10ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-10ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-10ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-10ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-09-10ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-09-10ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-10ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-10ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-09-10ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-09-10ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-09-10ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-10ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1055.56~22.04.1) @ jammy2026-09-10ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-09-10ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-09-10ubuntu
redhatkernel-0:6.12.0-211.53.1.el10_22026-09-08redhat
linuxKernel @ 5.15.202—osv

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
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (116 versions)6.19.6-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 18× in last 7d / 71× 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 248 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43133?
CVE-2026-43133 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80ae69f ("KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state") made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed…
When was CVE-2026-43133 disclosed?
CVE-2026-43133 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43133 actively exploited?
CVE-2026-43133 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-2026-43133?
CVE-2026-43133 has a CVSS v3 base score of 7.9 (NVD).
How do I remediate CVE-2026-43133?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43133, 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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