CVE-2026-23679
libusb < 1.0.30 NULL Pointer Dereference in parse_interface()
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.
INFO
Published Date :
May 27, 2026, 2:16 p.m.
Last Modified :
May 28, 2026, 5:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update libusb to version 1.0.30 or later.
- Validate USB descriptors for malformed data.
- Avoid parsing untrusted USB descriptors.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-23679.
| URL | Resource |
|---|---|
| https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704 | Patch |
| https://github.com/libusb/libusb/issues/1813 | Issue Tracking Mitigation |
| https://github.com/libusb/libusb/pull/1814 | Issue Tracking Patch |
| https://github.com/libusb/libusb/releases/tag/v1.0.30 | Product Release Notes |
| https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface | Patch Third Party Advisory |
| https://github.com/libusb/libusb/issues/1813 | Issue Tracking Mitigation |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-23679 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-23679
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-23679 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-23679 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 28, 2026
Action Type Old Value New Value Added Reference https://github.com/libusb/libusb/issues/1813 -
Initial Analysis by [email protected]
May. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:libusb:libusb:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.30 Added Reference Type VulnCheck: https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704 Types: Patch Added Reference Type VulnCheck: https://github.com/libusb/libusb/issues/1813 Types: Issue Tracking, Mitigation Added Reference Type VulnCheck: https://github.com/libusb/libusb/pull/1814 Types: Issue Tracking, Patch Added Reference Type VulnCheck: https://github.com/libusb/libusb/releases/tag/v1.0.30 Types: Product, Release Notes Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface Types: Patch, Third Party Advisory -
New CVE Received by [email protected]
May. 27, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-125 Added Reference https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704 Added Reference https://github.com/libusb/libusb/issues/1813 Added Reference https://github.com/libusb/libusb/pull/1814 Added Reference https://github.com/libusb/libusb/releases/tag/v1.0.30 Added Reference https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface