CVE-2026-67846

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Berkeley Out-of-Order Machine (BOOM) commit 5223e44cfeb26f41380057a2eb4d651197475f69 contains a potential incorrect privilege assignment issue in the v3 and v4 NBDTLB implementations. The raw mstatus.SUM value participates in the read and write permission logic without an explicit local satp.MODE validity check at the use site

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.2%
EPSS %ILE
3rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 21, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

GitHub - duan528/CVE-2026-67846-BOOM-NBDTLB: Public vulnerability advisory and supporting evidence for CVE-2026-67846 affecting the BOOM v3/v4 NBDTLB implementation. · GitHub

https://github.com/duan528/CVE-2026-67846-BOOM-NBDTLB
github_commit

commit 5223e44cfeb2 (riscv-boom/riscv-boom)

Fix landed in riscv-boom/riscv-boom commit 5223e44cfeb2 — awaiting tagged release

https://github.com/riscv-boom/riscv-boom/commit/5223e44cfeb26f41380057a2eb4d651197475f69
generic

GitHub - riscv-boom/riscv-boom: SonicBOOM: The Berkeley Out-of-Order Machine · GitHub

https://github.com/riscv-boom/riscv-boom

Vendor Advisories for CVE-2026-67846(1)

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 21× in last 7d / 95× 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 156 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-67846?
CVE-2026-67846 is a high vulnerability published on August 18, 2026. Berkeley Out-of-Order Machine (BOOM) commit 5223e44cfeb26f41380057a2eb4d651197475f69 contains a potential incorrect privilege assignment issue in the v3 and v4 NBDTLB implementations. The raw mstatus.SUM value participates in the read and write permission logic without an explicit local satp.MODE…
When was CVE-2026-67846 disclosed?
CVE-2026-67846 was first published on August 18, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67846 actively exploited?
CVE-2026-67846 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67846?
CVE-2026-67846 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67846?
An upstream fix for CVE-2026-67846 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-67846 are linked in the Vendor Advisories panel on this page.

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