CVE-2026-23679

MEDIUM EPSS 8.2%
Published May 27, 20261mo ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Medium
Find Similar
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
8.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
libusblibusb* <1.0.30

References 5

  • github.com https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704
    Patch
  • github.com https://github.com/libusb/libusb/issues/1813
    Issue TrackingMitigation
  • github.com https://github.com/libusb/libusb/pull/1814
    Issue TrackingPatch
  • github.com https://github.com/libusb/libusb/releases/tag/v1.0.30
    ProductRelease Notes
  • vulncheck.com https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704
    Patch
  • github.com https://github.com/libusb/libusb/pull/1814
    Issue TrackingPatch
  • vulncheck.com https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface
    PatchThird Party Advisory