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
5.5EG
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

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)
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
0%
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.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.19.6—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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 19× 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 165 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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% probability of exploitation in the next 30 days, which ranks it in the top 99.7% of all scored CVEs.
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.

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