Answer in brief
CVE-2026-23307 records a Unknown severity vulnerability in can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=702171adeed3607ee9603ec30ce081411e36ae42 <aed172a2e2330131f0977d2acd3ec8883f413ec1 || >=702171adeed3607ee9603ec30ce081411e36ae42 <f10177e6c4575aedaea580ce67d792fab7a2235e || >=702171adeed3607ee9603ec30ce081411e36ae42 <c703bbf8e9b4947e111c88d2ed09236a6772a471 || >=702171adeed3607ee9603ec30ce081411e36ae42 <1818974e1b5ef200e27f144c8cb8a246420bb54d || >=702171adeed3607ee9603ec30ce081411e36ae42 <18f75b9cbdc3703f15965425ab69dee509b07785 || >=702171adeed3607ee9603ec30ce081411e36ae42 <1cf469026d4a2308eaa91d04dca4a900d07a5c2e || >=702171adeed3607ee9603ec30ce081411e36ae42 <2833e13e2b099546abf5d40a483b4eb04ddd1f7b || >=702171adeed3607ee9603ec30ce081411e36ae42 <38a01c9700b0dcafe97dfa9dc7531bf4a245deff | aed172a2e2330131f0977d2acd3ec8883f413ec1, f10177e6c4575aedaea580ce67d792fab7a2235e, c703bbf8e9b4947e111c88d2ed09236a6772a471, 1818974e1b5ef200e27f144c8cb8a246420bb54d, 18f75b9cbdc3703f15965425ab69dee509b07785, 1cf469026d4a2308eaa91d04dca4a900d07a5c2e, 2833e13e2b099546abf5d40a483b4eb04ddd1f7b, 38a01c9700b0dcafe97dfa9dc7531bf4a245deff |
| Linux/Linuxgeneric | 2.6.32 | Not reported |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.