CVE-2026-42805

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-10. A secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (located in bhi385_parse.c). The function parses FIFO events and extracts an 8-bit message length directly from the attacker-controlled event payload (callback_info->data_ptr[0]) without enforcing bounds checks or clamping the value. When copying the payload into a fixed-size stack buffer of 17 bytes (uint8_t debug_msg[17]) via memcpy, providing a length byte greater than 16 causes the function to write past the allocated stack boundary. This memory corruption can be triggered by a malicious or compromised sensor or bus participant, leading to a firmware crash, Denial of Service (DoS), or potentially the execution of arbitrary code via adjacent stack data corruption.

CVSS v3
8.4
EG Score
8.4HIGHhigh confidence
EG Risk
38
EG Risk 38/100CISA 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

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

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

BOSCH-SA-223618 | Bosch PSIRT

https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html

Vendor Advisories for CVE-2026-42805(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 24× in last 7d / 96× 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. 2026-10-05 00:33 UTCEG score recompute
  2. 2026-10-05 00:33 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 12:44 UTCGHSA enrichment
  5. 2026-10-04 00:55 UTCEG score recompute
  6. 2026-10-04 00:55 UTCGHSA enrichment
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-03 13:06 UTCGHSA enrichment
  9. 2026-10-03 01:09 UTCEG score recompute
  10. 2026-10-03 01:09 UTCGHSA enrichment
  11. 2026-10-02 13:20 UTCGHSA enrichment
  12. 2026-10-02 01:28 UTCEG score recompute
  13. 2026-10-02 01:28 UTCGHSA enrichment
  14. 2026-10-01 19:50 UTCEPSS rescore
  15. 2026-10-01 13:39 UTCGHSA enrichment
  16. 2026-10-01 01:50 UTCEG score recompute
  17. 2026-10-01 01:50 UTCGHSA enrichment
  18. 2026-09-30 15:03 UTCEPSS rescore
  19. 2026-09-30 14:02 UTCGHSA enrichment
  20. 2026-09-30 01:58 UTCEG score recompute
  21. 2026-09-30 01:58 UTCGHSA enrichment
  22. 2026-09-29 10:54 UTCGHSA enrichment
  23. 2026-09-28 22:20 UTCEG score recompute
  24. 2026-09-28 22:20 UTCGHSA enrichment
  25. 2026-09-28 10:30 UTCGHSA enrichment
Show 71 more
  1. 2026-09-27 22:41 UTCEG score recompute
  2. 2026-09-27 22:41 UTCGHSA enrichment
  3. 2026-09-27 13:48 UTCEPSS rescore
  4. 2026-09-27 10:52 UTCGHSA enrichment
  5. 2026-09-26 22:48 UTCEG score recompute
  6. 2026-09-26 22:47 UTCGHSA enrichment
  7. 2026-09-26 15:58 UTCEPSS rescore
  8. 2026-09-26 10:49 UTCEG score recompute
  9. 2026-09-26 10:49 UTCGHSA enrichment
  10. 2026-09-25 22:47 UTCGHSA enrichment
  11. 2026-09-25 10:59 UTCGHSA enrichment
  12. 2026-09-24 23:09 UTCEG score recompute
  13. 2026-09-24 23:09 UTCGHSA enrichment
  14. 2026-09-24 11:19 UTCGHSA enrichment
  15. 2026-09-23 23:30 UTCEG score recompute
  16. 2026-09-23 23:30 UTCGHSA enrichment
  17. 2026-09-23 17:53 UTCEPSS rescore
  18. 2026-09-23 11:42 UTCGHSA enrichment
  19. 2026-09-22 23:53 UTCEG score recompute
  20. 2026-09-22 23:53 UTCGHSA enrichment
  21. 2026-09-22 12:04 UTCGHSA enrichment
  22. 2026-09-22 00:15 UTCEG score recompute
  23. 2026-09-22 00:15 UTCGHSA enrichment
  24. 2026-09-21 12:26 UTCGHSA enrichment
  25. 2026-09-21 00:37 UTCEG score recompute
  26. 2026-09-21 00:37 UTCGHSA enrichment
  27. 2026-09-20 20:15 UTCEPSS rescore
  28. 2026-09-20 12:48 UTCGHSA enrichment
  29. 2026-09-20 00:59 UTCEG score recompute
  30. 2026-09-20 00:58 UTCGHSA enrichment
  31. 2026-09-19 13:09 UTCGHSA enrichment
  32. 2026-09-19 01:20 UTCEG score recompute
  33. 2026-09-19 01:20 UTCGHSA enrichment
  34. 2026-09-18 19:28 UTCEPSS rescore
  35. 2026-09-18 13:32 UTCGHSA enrichment
  36. 2026-09-18 01:43 UTCEG score recompute
  37. 2026-09-18 01:43 UTCGHSA enrichment
  38. 2026-09-17 19:31 UTCEPSS rescore
  39. 2026-09-17 13:54 UTCGHSA enrichment
  40. 2026-09-17 02:05 UTCGHSA enrichment
  41. 2026-09-16 14:16 UTCEG score recompute
  42. 2026-09-16 14:16 UTCGHSA enrichment
  43. 2026-09-16 14:08 UTCEPSS rescore
  44. 2026-09-16 05:15 UTCEPSS rescore
  45. 2026-09-16 02:27 UTCGHSA enrichment
  46. 2026-09-15 14:38 UTCEG score recompute
  47. 2026-09-15 14:38 UTCGHSA enrichment
  48. 2026-09-15 02:49 UTCGHSA enrichment
  49. 2026-09-14 15:00 UTCGHSA enrichment
  50. 2026-09-14 03:12 UTCEG score recompute
  51. 2026-09-14 03:12 UTCGHSA enrichment
  52. 2026-09-13 16:47 UTCEPSS rescore
  53. 2026-09-13 15:23 UTCGHSA enrichment
  54. 2026-09-13 03:34 UTCGHSA enrichment
  55. 2026-09-12 15:45 UTCEG score recompute
  56. 2026-09-12 15:45 UTCGHSA enrichment
  57. 2026-09-12 15:01 UTCEPSS rescore
  58. 2026-09-12 03:56 UTCGHSA enrichment
  59. 2026-09-11 16:07 UTCEG score recompute
  60. 2026-09-11 16:07 UTCGHSA enrichment
  61. 2026-09-11 09:37 UTCEPSS rescore
  62. 2026-09-11 04:10 UTCGHSA enrichment
  63. 2026-09-10 16:21 UTCGHSA enrichment
  64. 2026-09-10 15:57 UTCEG score recompute
  65. 2026-09-10 15:57 UTCGHSA enrichment
  66. 2026-09-10 15:22 UTCEG score recompute
  67. 2026-09-10 15:22 UTCGHSA enrichment
  68. 2026-09-10 09:36 UTCEG score recompute
  69. 2026-09-10 09:36 UTCGHSA enrichment
  70. 2026-09-10 09:10 UTCEG score recompute
  71. 2026-09-10 09:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42805?
CVE-2026-42805 is a high vulnerability published on September 10, 2026. A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385parsedebugmessage (located in bhi385parse.c). The function parses FIFO events and extracts an 8-bit message length directly from the…
When was CVE-2026-42805 disclosed?
CVE-2026-42805 was first published on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42805 actively exploited?
CVE-2026-42805 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42805?
CVE-2026-42805 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-42805?
No fix for CVE-2026-42805 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-42805 are linked in the Vendor Advisories panel on this page.

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