Medium 5.5Published Mar 25, 2026

CVE-2026-23307can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message

Updated under an hour ago (Oct 26, 2026, 10:00 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 702171adeed3607ee9603ec30ce081411e36ae42 before aed172a2e2330131f0977d2acd3ec8883f413ec1; from 702171adeed3607ee9603ec30ce081411e36ae42 before f10177e6c4575aedaea580ce67d792fab7a2235e; from 702171adeed3607ee9603ec30ce081411e36ae42 before c703bbf8e9b4947e111c88d2ed09236a6772a471; from 702171adeed3607ee9603ec30ce081411e36ae42 before 1818974e1b5ef200e27f144c8cb8a246420bb54d; 702171adeed3607ee9603ec30ce081411e36ae42 builds before 18f75b9cbdc3703f15965425ab69dee509b07785; 702171adeed3607ee9603ec30ce081411e36ae42 builds before 1cf469026d4a2308eaa91d04dca4a900d07a5c2e; 702171adeed3607ee9603ec30ce081411e36ae42 builds before 2833e13e2b099546abf5d40a483b4eb04ddd1f7b; 702171adeed3607ee9603ec30ce081411e36ae42 builds before 38a01c9700b0dcafe97dfa9dc7531bf4a245deff	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.32 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 7.0; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/aed172a2e2330131f0977d2acd3ec8883f413ec1	patch
https://git.kernel.org/stable/c/f10177e6c4575aedaea580ce67d792fab7a2235e	patch
https://git.kernel.org/stable/c/c703bbf8e9b4947e111c88d2ed09236a6772a471	patch
https://git.kernel.org/stable/c/1818974e1b5ef200e27f144c8cb8a246420bb54d	patch
https://git.kernel.org/stable/c/18f75b9cbdc3703f15965425ab69dee509b07785	patch
https://git.kernel.org/stable/c/1cf469026d4a2308eaa91d04dca4a900d07a5c2e	patch
https://git.kernel.org/stable/c/2833e13e2b099546abf5d40a483b4eb04ddd1f7b	patch
https://git.kernel.org/stable/c/38a01c9700b0dcafe97dfa9dc7531bf4a245deff	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.