CVE-2026-43399

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-08. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl

Drop reference to syncobj and timeline fence when aborting the ioctl due output array being too small.

(cherry picked from commit 68951e9c3e6bb22396bc42ef2359751c8315dd27)

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
2.2%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 21, 2026

Advisory Details (3)

Auto-updated Jun 17, 2026
No patch confirmed yet.
generic

drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/762f47e2b824383d5be65eee2c40a1269b7d50c8
generic

drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5409247d41f372bec5b141ef599f2d9f5e81b746
generic

drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/49abfa812617a7f2d0132c70d23ac98b389c6ec1

Vendor Advisories for CVE-2026-43399(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 38× 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 103 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-12 05:46 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 15:16 UTCEPSS rescore
  8. 2026-07-07 13:46 UTCEPSS rescore
  9. 2026-07-06 16:27 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-01 15:06 UTCEPSS rescore
  14. 2026-06-30 23:22 UTCEPSS rescore
  15. 2026-06-29 14:06 UTCEPSS rescore
  16. 2026-06-28 14:07 UTCEPSS rescore
  17. 2026-06-28 04:56 UTCEPSS rescore
  18. 2026-06-28 04:55 UTCEG score recompute
  19. 2026-06-28 04:55 UTCGHSA enrichment
  20. 2026-06-27 03:08 UTCEPSS rescore
  21. 2026-06-26 21:25 UTCEG score recompute
  22. 2026-06-26 21:25 UTCGHSA enrichment
  23. 2026-06-25 13:49 UTCEPSS rescore
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 14:05 UTCEPSS rescore
Show 75 more
  1. 2026-06-23 21:33 UTCEPSS rescore
  2. 2026-06-22 14:25 UTCEPSS rescore
  3. 2026-06-22 14:25 UTCEPSS rescore
  4. 2026-06-21 14:56 UTCEPSS rescore
  5. 2026-06-21 14:56 UTCEPSS rescore
  6. 2026-06-21 01:59 UTCEPSS rescore
  7. 2026-06-19 19:25 UTCEPSS rescore
  8. 2026-06-18 17:52 UTCEPSS rescore
  9. 2026-06-18 17:52 UTCEPSS rescore
  10. 2026-06-17 17:53 UTCEPSS rescore
  11. 2026-06-17 01:30 UTCEG score recompute
  12. 2026-06-17 01:29 UTCGHSA enrichment
  13. 2026-06-16 17:52 UTCEPSS rescore
  14. 2026-06-15 17:49 UTCEPSS rescore
  15. 2026-06-15 04:14 UTCEG score recompute
  16. 2026-06-15 04:14 UTCGHSA enrichment
  17. 2026-06-14 02:50 UTCEG score recompute
  18. 2026-06-14 02:50 UTCGHSA enrichment
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-12 23:12 UTCEPSS rescore
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 01:50 UTCEG score recompute
  23. 2026-06-12 01:50 UTCGHSA enrichment
  24. 2026-06-11 14:00 UTCEPSS rescore
  25. 2026-06-11 00:30 UTCEG score recompute
  26. 2026-06-11 00:30 UTCGHSA enrichment
  27. 2026-06-10 22:18 UTCEPSS rescore
  28. 2026-06-10 13:22 UTCEPSS rescore
  29. 2026-06-10 13:22 UTCEPSS rescore
  30. 2026-06-09 22:44 UTCEG score recompute
  31. 2026-06-09 22:44 UTCGHSA enrichment
  32. 2026-06-08 20:43 UTCEG score recompute
  33. 2026-06-08 20:43 UTCGHSA enrichment
  34. 2026-06-08 14:17 UTCEPSS rescore
  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-07 15:47 UTCEG score recompute
  37. 2026-06-07 15:47 UTCGHSA enrichment
  38. 2026-06-07 15:25 UTCEPSS rescore
  39. 2026-06-07 15:25 UTCEPSS rescore
  40. 2026-06-06 14:27 UTCEG score recompute
  41. 2026-06-06 14:27 UTCGHSA enrichment
  42. 2026-06-06 13:47 UTCEPSS rescore
  43. 2026-06-06 13:47 UTCEPSS rescore
  44. 2026-06-05 22:47 UTCEPSS rescore
  45. 2026-06-05 13:04 UTCEG score recompute
  46. 2026-06-05 13:04 UTCGHSA enrichment
  47. 2026-06-05 06:10 UTCEPSS rescore
  48. 2026-06-05 06:10 UTCEPSS rescore
  49. 2026-06-04 13:12 UTCEPSS rescore
  50. 2026-06-04 13:12 UTCEPSS rescore
  51. 2026-06-04 11:45 UTCEG score recompute
  52. 2026-06-04 11:45 UTCGHSA enrichment
  53. 2026-06-03 10:26 UTCEG score recompute
  54. 2026-06-03 10:26 UTCGHSA enrichment
  55. 2026-06-02 20:13 UTCEPSS rescore
  56. 2026-06-02 09:07 UTCEG score recompute
  57. 2026-06-02 09:07 UTCGHSA enrichment
  58. 2026-06-01 13:52 UTCEPSS rescore
  59. 2026-06-01 13:52 UTCEPSS rescore
  60. 2026-06-01 07:47 UTCEG score recompute▲ 5.50
  61. 2026-06-01 07:47 UTCGHSA enrichment
  62. 2026-05-31 22:30 UTCEPSS rescore
  63. 2026-05-31 22:30 UTCEPSS rescore
  64. 2026-05-31 00:16 UTCEPSS rescore
  65. 2026-05-31 00:16 UTCEPSS rescore
  66. 2026-05-29 13:44 UTCEPSS rescore
  67. 2026-05-29 13:44 UTCEPSS rescore
  68. 2026-05-28 13:44 UTCEPSS rescore
  69. 2026-05-28 13:44 UTCEPSS rescore
  70. 2026-05-27 13:40 UTCEPSS rescore
  71. 2026-05-27 13:40 UTCEPSS rescore
  72. 2026-05-26 13:44 UTCEPSS rescore
  73. 2026-05-26 07:18 UTCEPSS rescore
  74. 2026-05-21 22:43 UTCEPSS rescore
  75. 2026-05-20 22:38 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-43399?
CVE-2026-43399 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Fix reference leak in amdgpuuserqwait_ioctl Drop reference to syncobj and timeline fence when aborting the ioctl due output array being too small. (cherry picked from commit…
When was CVE-2026-43399 disclosed?
CVE-2026-43399 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43399 actively exploited?
CVE-2026-43399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43399?
CVE-2026-43399 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43399?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43399, 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.

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