CVE-2026-23307
can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message
Description
In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message When looking at the data in a USB urb, the actual_length is the size of the buffer passed to the driver, not the transfer_buffer_length which is set by the driver as the max size of the buffer. When parsing the messages in ems_usb_read_bulk_callback() properly check the size both at the beginning of parsing the message to make sure it is big enough for the expected structure, and at the end of the message to make sure we don't overflow past the end of the buffer for the next message.
INFO
Published Date :
March 25, 2026, 11:16 a.m.
Last Modified :
May 28, 2026, 2:28 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to the latest version.
- Ensure proper USB message length validation.
- Check buffer boundaries during message parsing.
- Apply security patches for the ems_usb driver.
Public PoC/Exploit Available at Github
CVE-2026-23307 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-23307.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-23307 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-2026-23307
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).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-23307 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-23307 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.
-
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 CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.7 *cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.17 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.130 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.77 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.203 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.167 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.32 up to (excluding) 5.10.253 Added Reference Type kernel.org: https://git.kernel.org/stable/c/1818974e1b5ef200e27f144c8cb8a246420bb54d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/18f75b9cbdc3703f15965425ab69dee509b07785 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1cf469026d4a2308eaa91d04dca4a900d07a5c2e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2833e13e2b099546abf5d40a483b4eb04ddd1f7b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/38a01c9700b0dcafe97dfa9dc7531bf4a245deff Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/aed172a2e2330131f0977d2acd3ec8883f413ec1 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c703bbf8e9b4947e111c88d2ed09236a6772a471 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f10177e6c4575aedaea580ce67d792fab7a2235e Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 18, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/aed172a2e2330131f0977d2acd3ec8883f413ec1 Added Reference https://git.kernel.org/stable/c/f10177e6c4575aedaea580ce67d792fab7a2235e -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 25, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message When looking at the data in a USB urb, the actual_length is the size of the buffer passed to the driver, not the transfer_buffer_length which is set by the driver as the max size of the buffer. When parsing the messages in ems_usb_read_bulk_callback() properly check the size both at the beginning of parsing the message to make sure it is big enough for the expected structure, and at the end of the message to make sure we don't overflow past the end of the buffer for the next message. Added Reference https://git.kernel.org/stable/c/1818974e1b5ef200e27f144c8cb8a246420bb54d Added Reference https://git.kernel.org/stable/c/18f75b9cbdc3703f15965425ab69dee509b07785 Added Reference https://git.kernel.org/stable/c/1cf469026d4a2308eaa91d04dca4a900d07a5c2e Added Reference https://git.kernel.org/stable/c/2833e13e2b099546abf5d40a483b4eb04ddd1f7b Added Reference https://git.kernel.org/stable/c/38a01c9700b0dcafe97dfa9dc7531bf4a245deff Added Reference https://git.kernel.org/stable/c/c703bbf8e9b4947e111c88d2ed09236a6772a471