CVE-2026-23679 (GCVE-0-2026-23679)

Vulnerability from cvelistv5 – Published: 2026-05-27 13:21 – Updated: 2026-07-14 15:53 X_Open Source
VLAI
Title
libusb < 1.0.30 NULL Pointer Dereference in parse_interface()
Summary
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.
Severity
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 15:44 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
libusb libusb Affected: 0 , < 1.0.30 (semver)
    cpe:2.3:a:libusb:libusb:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-25 00:00
Credits
djnn
Show details on NVD website
To clipboard 

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              "url": "https://github.com/libusb/libusb/releases/tag/v1.0.30"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/libusb/libusb/issues/1813"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/libusb/libusb/pull/1814"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "tags": [
            "x_open-source"
          ],
          "title": "libusb \u003c 1.0.30 NULL Pointer Dereference in parse_interface()",
          "x_generator": {
            "engine": "vulncheck"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-23679",
        "datePublished": "2026-05-27T13:21:37.035Z",
        "dateReserved": "2026-01-14T17:13:44.903Z",
        "dateUpdated": "2026-07-14T15:53:32.218Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.