CVE-2026-43191

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-06. 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: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35

[Why] A backport of the change made for DCN401 that addresses an issue where we turn off the PHY PLL when disabling TMDS output, which causes the OTG to remain stuck.

The OTG being stuck can lead to a hang in the DCHVM's ability to ACK invalidations when it thinks the HUBP is still on but it's not receiving global sync.

The transition to PLL_ON needs to be atomic as there's no guarantee that the thread isn't pre-empted or is able to complete before the IOMMU watchdog times out.

[How] Backport the implementation from dcn401 back to dcn35.

There's a functional difference in when the eDP output is disabled in dcn401 code so we don't want to utilize it directly.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
1.6%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 11, 2026

Advisory Details (2)

Auto-updated May 11, 2026
No patch confirmed yet.
generic

drm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35 - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d1f7ceb00e8956ff6d183b7b45ef4e73c96f4c51
generic

drm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35 - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/75372d75a4e23783583998ed99d5009d555850da

Vendor Advisories for CVE-2026-43191(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 5× in last 7d / 27× 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 114 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. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-09 19:10 UTCEPSS rescore
  6. 2026-07-08 15:16 UTCEPSS rescore
  7. 2026-07-07 13:46 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-01 15:06 UTCEPSS rescore
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-28 14:07 UTCEPSS rescore
  15. 2026-06-28 04:56 UTCEPSS rescore
  16. 2026-06-27 03:08 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-19 19:25 UTCEPSS rescore
  24. 2026-06-18 17:52 UTCEPSS rescore
  25. 2026-06-18 17:52 UTCEPSS rescore
Show 75 more
  1. 2026-06-17 17:53 UTCEPSS rescore
  2. 2026-06-16 17:52 UTCEPSS rescore
  3. 2026-06-15 17:49 UTCEPSS rescore
  4. 2026-06-15 06:36 UTCEG score recompute
  5. 2026-06-15 06:36 UTCVendor advisory
  6. 2026-06-15 06:36 UTCGHSA enrichment
  7. 2026-06-14 07:36 UTCEG score recompute
  8. 2026-06-14 07:36 UTCVendor advisory
  9. 2026-06-14 07:36 UTCGHSA enrichment
  10. 2026-06-13 23:00 UTCEPSS rescore
  11. 2026-06-13 00:30 UTCEG score recompute
  12. 2026-06-13 00:30 UTCVendor advisory
  13. 2026-06-13 00:29 UTCGHSA enrichment
  14. 2026-06-12 23:12 UTCEPSS rescore
  15. 2026-06-12 23:12 UTCEPSS rescore
  16. 2026-06-12 00:46 UTCEG score recompute
  17. 2026-06-12 00:46 UTCVendor advisory
  18. 2026-06-12 00:46 UTCGHSA enrichment
  19. 2026-06-11 14:00 UTCEPSS rescore
  20. 2026-06-11 01:47 UTCEG score recompute
  21. 2026-06-11 01:47 UTCVendor advisory
  22. 2026-06-11 01:47 UTCGHSA enrichment
  23. 2026-06-10 22:18 UTCEPSS rescore
  24. 2026-06-10 13:22 UTCEPSS rescore
  25. 2026-06-10 13:22 UTCEPSS rescore
  26. 2026-06-10 01:31 UTCEG score recompute
  27. 2026-06-10 01:31 UTCVendor advisory
  28. 2026-06-10 01:31 UTCGHSA enrichment
  29. 2026-06-09 02:32 UTCEG score recompute
  30. 2026-06-09 02:32 UTCVendor advisory
  31. 2026-06-09 02:32 UTCGHSA enrichment
  32. 2026-06-08 14:17 UTCEPSS rescore
  33. 2026-06-08 14:17 UTCEPSS rescore
  34. 2026-06-08 02:43 UTCEG score recompute
  35. 2026-06-08 02:43 UTCVendor advisory
  36. 2026-06-08 02:43 UTCGHSA enrichment
  37. 2026-06-07 15:25 UTCEPSS rescore
  38. 2026-06-07 15:25 UTCEPSS rescore
  39. 2026-06-07 03:44 UTCEG score recompute
  40. 2026-06-07 03:44 UTCVendor advisory
  41. 2026-06-07 03:44 UTCGHSA enrichment
  42. 2026-06-06 13:47 UTCEPSS rescore
  43. 2026-06-06 13:47 UTCEPSS rescore
  44. 2026-06-06 04:45 UTCEG score recompute
  45. 2026-06-06 04:45 UTCVendor advisory
  46. 2026-06-06 04:45 UTCGHSA enrichment
  47. 2026-06-05 22:47 UTCEPSS rescore
  48. 2026-06-05 06:10 UTCEPSS rescore
  49. 2026-06-05 06:10 UTCEPSS rescore
  50. 2026-06-05 05:46 UTCEG score recompute
  51. 2026-06-05 05:46 UTCVendor advisory
  52. 2026-06-05 05:46 UTCGHSA enrichment
  53. 2026-06-04 13:12 UTCEPSS rescore
  54. 2026-06-04 13:12 UTCEPSS rescore
  55. 2026-06-04 06:45 UTCEG score recompute
  56. 2026-06-04 06:45 UTCVendor advisory
  57. 2026-06-04 06:45 UTCGHSA enrichment
  58. 2026-06-03 07:32 UTCEG score recompute
  59. 2026-06-03 07:32 UTCVendor advisory
  60. 2026-06-03 07:32 UTCGHSA enrichment
  61. 2026-06-02 20:13 UTCEPSS rescore
  62. 2026-06-02 08:33 UTCEG score recompute
  63. 2026-06-02 08:33 UTCVendor advisory
  64. 2026-06-02 08:33 UTCGHSA enrichment
  65. 2026-06-01 13:52 UTCEPSS rescore
  66. 2026-06-01 13:52 UTCEPSS rescore
  67. 2026-06-01 09:34 UTCEG score recompute
  68. 2026-06-01 09:34 UTCVendor advisory
  69. 2026-06-01 09:34 UTCGHSA enrichment
  70. 2026-05-31 22:30 UTCEPSS rescore
  71. 2026-05-31 22:30 UTCEPSS rescore
  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-31 00:16 UTCEPSS rescore
  74. 2026-05-29 13:44 UTCEPSS rescore
  75. 2026-05-29 13:44 UTCEPSS rescore

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-43191?
CVE-2026-43191 is a medium vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Adjust PHY FSM transition to TXEN-to-PLLON for TMDS on DCN35 [Why] A backport of the change made for DCN401 that addresses an issue where we turn off the PHY PLL when disabling TMDS output, which causes the OTG to…
When was CVE-2026-43191 disclosed?
CVE-2026-43191 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43191 actively exploited?
CVE-2026-43191 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43191?
CVE-2026-43191 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43191?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43191, 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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