CVE-2021-47046

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-02-28. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: 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 off by one in hdmi_14_process_transaction()

The hdcp_i2c_offsets[] array did not have an entry for HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one read overflow. I added an entry and copied the 0x0 value for the offset from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c.

I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX entries. This doesn't change the code, but it's just a belt and suspenders approach to try future proof the code.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
15.6%
KEV
Not listed

Published

February 28, 2024

Last Modified

December 9, 2024

References (8)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 47× 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.

  1. 2026-07-11 08:25 UTCEPSS rescore
  2. 2026-07-09 19:07 UTCEPSS rescore
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  24. 2026-06-26 19:09 UTCOSV refresh
  25. 2026-06-25 13:48 UTCEPSS rescore
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  1. 2026-06-25 13:48 UTCEPSS rescore
  2. 2026-06-24 14:03 UTCEPSS rescore
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  6. 2026-06-22 14:24 UTCEPSS rescore
  7. 2026-06-21 14:55 UTCEPSS rescore
  8. 2026-06-21 01:58 UTCEPSS rescore
  9. 2026-06-21 01:58 UTCEPSS rescore
  10. 2026-06-19 19:24 UTCEPSS rescore
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  12. 2026-06-18 17:51 UTCEPSS rescore
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  22. 2026-06-12 23:10 UTCEPSS rescore
  23. 2026-06-11 13:58 UTCEPSS rescore
  24. 2026-06-10 22:16 UTCEPSS rescore
  25. 2026-06-10 13:20 UTCEPSS rescore
  26. 2026-06-09 04:00 UTCOSV refresh
  27. 2026-06-08 14:15 UTCEPSS rescore
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  44. 2026-05-31 22:29 UTCEPSS rescore
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  47. 2026-05-29 13:42 UTCEPSS rescore
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  49. 2026-05-28 13:43 UTCEPSS rescore
  50. 2026-05-27 13:39 UTCEPSS rescore
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  52. 2026-05-26 13:43 UTCEPSS rescore
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  54. 2026-05-26 07:17 UTCEPSS rescore
  55. 2026-05-26 07:17 UTCEPSS rescore
  56. 2026-05-24 07:41 UTCEG score recompute
  57. 2026-05-24 07:41 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-47046?
CVE-2021-47046 is a high vulnerability published on February 28, 2024. In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi14process_transaction() The hdcpi2coffsets[] array did not have an entry for HDCPMESSAGEIDWRITECONTENTSTREAMTYPE so it led to an off by one read overflow. I added an entry and copied the 0x0…
When was CVE-2021-47046 disclosed?
CVE-2021-47046 was first published in the National Vulnerability Database on February 28, 2024, with the most recent update on December 9, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47046 actively exploited?
CVE-2021-47046 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-47046?
CVE-2021-47046 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2021-47046?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47046, 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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