CVE-2026-43305

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/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path

[Why] The evaluation for whether we need to use the DMUB HW lock isn't the same as whether we need to unlock which results in a hang when the fast path is used for ASIC without FAMS support.

[How] Store a flag that indicates whether we should use the lock and use that same flag to specify whether unlocking is needed.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
0.3%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 15, 2026

Advisory Details (2)

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

drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/af3303970da5ce5bfe6dffdd07f38f42aad603e0
generic

drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4e387ad67efb100b645630ffbce7716786f52283

Vendor Advisories for CVE-2026-43305(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 35× 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 104 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43305?
CVE-2026-43305 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path [Why] The evaluation for whether we need to use the DMUB HW lock isn't the same as whether we need to unlock which results in a hang when the fast path is…
When was CVE-2026-43305 disclosed?
CVE-2026-43305 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43305 actively exploited?
CVE-2026-43305 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43305?
CVE-2026-43305 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43305?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43305, 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

Explore the affected products and dependency analysis for CVE-2026-43305

Explore →

Is Your Infrastructure Affected by CVE-2026-43305?

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