CVE-2026-23679

MEDIUMNVD 5.56.2▲
EchelonGraph scoreMEDIUM confidence

Score 6.2 from GitHub Security Advisory published 2026-05-27. the CNA's CVSS baseline 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 4 sources updated this weekElevated
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.

libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.

CVSS v3
5.5
EG Score
6.2(medium)
EPSS
8.2%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jun 13, 2026
Patch available. Sources: github_commit, github_pr, github_release.
generic

Two memory-safety bugs in libusb/descriptor.c found by fuzzing (parse_interface NULL endpoint, parse_iad_array OOB read) · Issue #1813 · libusb/libusb · GitHub

https://github.com/libusb/libusb/issues/1813
generic

libusb < 1.0.30 NULL Pointer Dereference in parse_interface() | Advisories | VulnCheck

https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface
github_release Patch Available

v1.0.30: libusb 1.0.30

Patch available: libusb/libusb v1.0.30

https://github.com/libusb/libusb/releases/tag/v1.0.30
github_pr

Fix/descriptor parser memory safety

Upstream fix in progress (PR #1814 · libusb/libusb, state=closed)

https://github.com/libusb/libusb/pull/1814
github_commit Patch Available

commit 578ab76b4c43 (libusb/libusb)

Patch available: libusb/libusb v1.0.30-rc2 (contains commit 578ab76b4c43)

https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704

Vendor Advisories for CVE-2026-23679(2)

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 14× in last 7d / 66× 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 134 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-14 17:20 UTCNVD updateCVSS v3 → 5.5
  6. 2026-07-13 22:30 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-11 23:26 UTCEG score recompute
  12. 2026-07-11 23:26 UTCGHSA enrichment
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-08 23:47 UTCEG score recompute
  16. 2026-07-08 23:47 UTCGHSA enrichment
  17. 2026-07-08 15:15 UTCEPSS rescore
  18. 2026-07-08 15:15 UTCEPSS rescore
  19. 2026-07-07 13:46 UTCEPSS rescore
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-06 16:27 UTCEPSS rescore
  22. 2026-07-05 02:30 UTCEPSS rescore
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-01 15:06 UTCEPSS rescore
Show 75 more
  1. 2026-07-01 15:06 UTCEPSS rescore
  2. 2026-07-01 10:06 UTCEG score recompute
  3. 2026-07-01 10:06 UTCGHSA enrichment
  4. 2026-06-30 23:22 UTCEPSS rescore
  5. 2026-06-30 23:22 UTCEPSS rescore
  6. 2026-06-29 14:09 UTCEG score recompute
  7. 2026-06-29 14:09 UTCGHSA enrichment
  8. 2026-06-29 14:06 UTCEPSS rescore
  9. 2026-06-28 14:07 UTCEPSS rescore
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-28 06:42 UTCEG score recompute
  12. 2026-06-28 06:42 UTCGHSA enrichment
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 05:46 UTCEG score recompute
  16. 2026-06-27 05:45 UTCGHSA enrichment
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-26 02:26 UTCEG score recompute
  19. 2026-06-26 02:26 UTCGHSA enrichment
  20. 2026-06-25 13:49 UTCEPSS rescore
  21. 2026-06-25 13:49 UTCEPSS rescore
  22. 2026-06-25 00:53 UTCEG score recompute
  23. 2026-06-25 00:53 UTCGHSA enrichment
  24. 2026-06-24 14:05 UTCEPSS rescore
  25. 2026-06-24 14:05 UTCEPSS rescore
  26. 2026-06-23 21:33 UTCEPSS rescore
  27. 2026-06-23 21:32 UTCEPSS rescore
  28. 2026-06-22 14:25 UTCEPSS rescore
  29. 2026-06-22 14:25 UTCEPSS rescore
  30. 2026-06-21 14:56 UTCEPSS rescore
  31. 2026-06-21 14:56 UTCEPSS rescore
  32. 2026-06-21 01:59 UTCEPSS rescore
  33. 2026-06-21 01:59 UTCEPSS rescore
  34. 2026-06-19 19:25 UTCEPSS rescore
  35. 2026-06-19 19:25 UTCEPSS rescore
  36. 2026-06-18 17:52 UTCEPSS rescore
  37. 2026-06-17 18:41 UTCEG score recompute
  38. 2026-06-17 18:41 UTCGHSA enrichment
  39. 2026-06-17 17:53 UTCEPSS rescore
  40. 2026-06-17 17:53 UTCEPSS rescore
  41. 2026-06-16 17:52 UTCEPSS rescore
  42. 2026-06-16 16:05 UTCEG score recompute
  43. 2026-06-16 16:05 UTCGHSA enrichment
  44. 2026-06-15 17:48 UTCEPSS rescore
  45. 2026-06-15 14:56 UTCEG score recompute
  46. 2026-06-15 14:56 UTCGHSA enrichment
  47. 2026-06-14 23:18 UTCEPSS rescore
  48. 2026-06-14 13:58 UTCEG score recompute
  49. 2026-06-14 13:58 UTCGHSA enrichment
  50. 2026-06-13 23:00 UTCEPSS rescore
  51. 2026-06-13 12:56 UTCEG score recompute
  52. 2026-06-13 12:56 UTCGHSA enrichment
  53. 2026-06-12 23:12 UTCEPSS rescore
  54. 2026-06-12 23:12 UTCEPSS rescore
  55. 2026-06-12 11:55 UTCEG score recompute
  56. 2026-06-12 11:55 UTCGHSA enrichment
  57. 2026-06-11 14:00 UTCEPSS rescore
  58. 2026-06-11 10:59 UTCEG score recompute
  59. 2026-06-11 10:58 UTCGHSA enrichment
  60. 2026-06-10 22:18 UTCEPSS rescore
  61. 2026-06-10 22:18 UTCEPSS rescore
  62. 2026-06-10 13:22 UTCEPSS rescore
  63. 2026-06-10 10:01 UTCEG score recompute
  64. 2026-06-10 10:01 UTCGHSA enrichment
  65. 2026-06-09 09:05 UTCEG score recompute
  66. 2026-06-09 09:05 UTCGHSA enrichment
  67. 2026-06-08 14:17 UTCEPSS rescore
  68. 2026-06-08 14:17 UTCEPSS rescore
  69. 2026-06-08 08:08 UTCEG score recompute
  70. 2026-06-08 08:08 UTCGHSA enrichment
  71. 2026-06-07 15:25 UTCEPSS rescore
  72. 2026-06-07 15:24 UTCEPSS rescore
  73. 2026-06-07 07:12 UTCEG score recompute
  74. 2026-06-07 07:12 UTCGHSA enrichment
  75. 2026-06-06 13:47 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-23679?
CVE-2026-23679 is a medium vulnerability published on May 27, 2026. libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength…
When was CVE-2026-23679 disclosed?
CVE-2026-23679 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23679 actively exploited?
CVE-2026-23679 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-23679?
CVE-2026-23679 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.2.
How do I remediate CVE-2026-23679?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23679, 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.

Dependency Blast Radius

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