Buffer processing issue in PEAK-System PCAN driver
CVE-2026-109576
6.8MEDIUM
What is CVE-2026-109576?
The PEAK-System PCAN driver exhibits a flaw in its record parsing mechanism. Specifically, the parser can detect malformed records correctly; however, the loop that processes the record list continues to advance its processed-bytes counter even when it has determined a record to be invalid. This behavior can lead to processing inconsistencies and potential exploitation within software environments relying on the affected driver.
Affected Version(s)
PCAN Windows CAN device drivers 0 <= 5.1.2
PEAK-System Device Driver Setup 0 <= 5.1.2.1151
PCAN Windows CAN device drivers 5.1.4
References
CVSS V4
Score:
6.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Seyeon Bang reported these vulnerabilities to CISA.