CVE-2026-46034

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-27. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

vfio/cdx: Fix NULL pointer dereference in interrupt trigger path

Add validation to ensure MSI is configured before accessing cdx_irqs array in vfio_cdx_set_msi_trigger(). Without this check, userspace can trigger a NULL pointer dereference by calling VFIO_DEVICE_SET_IRQS with VFIO_IRQ_SET_DATA_BOOL or VFIO_IRQ_SET_DATA_NONE flags before ever setting up interrupts via VFIO_IRQ_SET_DATA_EVENTFD.

The vfio_cdx_msi_enable() function allocates the cdx_irqs array and sets config_msi to 1 only when called through the EVENTFD path. The trigger loop (for DATA_BOOL/DATA_NONE) assumed this had already been done, but there was no enforcement of this call ordering.

This matches the protection used in the PCI VFIO driver where vfio_pci_set_msi_trigger() checks irq_is() before the trigger loop.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 16, 2026

Advisory Details (4)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

vfio/cdx: Fix NULL pointer dereference in interrupt trigger path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5ea5880764cbb164afb17a62e76ca75dc371409d
generic

vfio/cdx: Fix NULL pointer dereference in interrupt trigger path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d6c349c9823eb819fed8b537b088cf38126018c
generic

vfio/cdx: Fix NULL pointer dereference in interrupt trigger path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/51bf7638f33aece41cb3f4cbeb942cc52950e329
generic

vfio/cdx: Fix NULL pointer dereference in interrupt trigger path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/338a736aaf15e8ba3635ce20b29af5b8fc15e66a

Vendor Advisories for CVE-2026-46034(1)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
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-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu

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—

Weakness Classification(1)

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

All Vendor Advisories

(6)

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 / 67× 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 195 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 05:26 UTCEG score recompute
  11. 2026-08-25 05:26 UTCVendor advisory
  12. 2026-08-25 05:26 UTCGHSA enrichment
  13. 2026-08-23 15:11 UTCEG score recompute
  14. 2026-08-23 15:11 UTCVendor advisory
  15. 2026-08-23 15:11 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-21 23:49 UTCEPSS rescore
  18. 2026-08-21 20:40 UTCEG score recompute
  19. 2026-08-21 20:40 UTCVendor advisory
  20. 2026-08-21 20:40 UTCGHSA enrichment
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 11:28 UTCEG score recompute
  23. 2026-08-20 11:28 UTCVendor advisory
  24. 2026-08-20 11:28 UTCGHSA enrichment
  25. 2026-08-19 17:04 UTCEPSS rescore
Show 75 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-17 09:18 UTCEG score recompute
  4. 2026-08-17 09:18 UTCVendor advisory
  5. 2026-08-17 09:18 UTCGHSA enrichment
  6. 2026-08-16 14:56 UTCEPSS rescore
  7. 2026-08-16 02:51 UTCEG score recompute
  8. 2026-08-16 02:51 UTCVendor advisory
  9. 2026-08-16 02:51 UTCGHSA enrichment
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-15 00:41 UTCVendor advisory
  13. 2026-08-15 00:41 UTCGHSA enrichment
  14. 2026-08-14 01:28 UTCEG score recompute
  15. 2026-08-14 01:28 UTCVendor advisory
  16. 2026-08-14 01:28 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-12 22:39 UTCEG score recompute
  19. 2026-08-12 22:39 UTCVendor advisory
  20. 2026-08-12 22:39 UTCGHSA enrichment
  21. 2026-08-12 13:51 UTCEPSS rescore
  22. 2026-08-11 23:26 UTCVendor advisory
  23. 2026-08-11 23:26 UTCGHSA enrichment
  24. 2026-08-11 00:13 UTCEG score recompute
  25. 2026-08-11 00:13 UTCVendor advisory
  26. 2026-08-11 00:13 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-09 20:44 UTCEG score recompute
  29. 2026-08-09 20:44 UTCVendor advisory
  30. 2026-08-09 20:44 UTCGHSA enrichment
  31. 2026-08-09 13:46 UTCEPSS rescore
  32. 2026-08-08 21:32 UTCEG score recompute
  33. 2026-08-08 21:32 UTCVendor advisory
  34. 2026-08-08 21:32 UTCGHSA enrichment
  35. 2026-08-08 16:37 UTCEPSS rescore
  36. 2026-08-07 19:19 UTCEG score recompute
  37. 2026-08-07 19:19 UTCVendor advisory
  38. 2026-08-07 19:19 UTCGHSA enrichment
  39. 2026-08-06 20:06 UTCEG score recompute
  40. 2026-08-06 20:06 UTCVendor advisory
  41. 2026-08-06 20:06 UTCGHSA enrichment
  42. 2026-08-06 13:47 UTCEPSS rescore
  43. 2026-08-05 20:54 UTCEG score recompute
  44. 2026-08-05 20:54 UTCVendor advisory
  45. 2026-08-05 20:54 UTCGHSA enrichment
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-04 15:10 UTCEPSS rescore
  48. 2026-08-04 10:39 UTCEPSS rescore
  49. 2026-08-03 16:28 UTCEG score recompute
  50. 2026-08-03 16:28 UTCVendor advisory
  51. 2026-08-03 16:28 UTCGHSA enrichment
  52. 2026-08-03 10:36 UTCEPSS rescore
  53. 2026-08-02 14:36 UTCEG score recompute
  54. 2026-08-02 14:36 UTCVendor advisory
  55. 2026-08-02 14:36 UTCGHSA enrichment
  56. 2026-08-02 02:27 UTCEPSS rescore
  57. 2026-08-01 15:23 UTCEG score recompute
  58. 2026-08-01 15:23 UTCVendor advisory
  59. 2026-08-01 15:23 UTCGHSA enrichment
  60. 2026-08-01 04:16 UTCEPSS rescore
  61. 2026-07-31 07:31 UTCEG score recompute
  62. 2026-07-31 07:31 UTCVendor advisory
  63. 2026-07-31 07:31 UTCGHSA enrichment
  64. 2026-07-30 16:28 UTCEPSS rescore
  65. 2026-07-30 01:30 UTCEPSS rescore
  66. 2026-07-29 15:20 UTCEG score recompute
  67. 2026-07-29 15:20 UTCGHSA enrichment
  68. 2026-07-28 15:36 UTCEPSS rescore
  69. 2026-07-27 14:13 UTCEPSS rescore
  70. 2026-07-27 10:28 UTCEG score recompute
  71. 2026-07-27 10:28 UTCGHSA enrichment
  72. 2026-07-26 14:54 UTCEPSS rescore
  73. 2026-07-26 14:54 UTCEPSS rescore
  74. 2026-07-24 14:17 UTCEPSS rescore
  75. 2026-07-23 14:18 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-46034?
CVE-2026-46034 is a medium vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: vfio/cdx: Fix NULL pointer dereference in interrupt trigger path Add validation to ensure MSI is configured before accessing cdx_irqs array in vfiocdxsetmsitrigger(). Without this check, userspace can trigger a NULL pointer…
When was CVE-2026-46034 disclosed?
CVE-2026-46034 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46034 actively exploited?
CVE-2026-46034 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-2026-46034?
CVE-2026-46034 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-46034?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46034, 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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