CVE-2026-37535 Details
Description
openxc/isotp-c thru commit 5a5d19245f65189202719321facd49ce6f5d46ac (2021-08-09) contains an out-of-bounds read in the ISO-TP Single Frame receive handler, where the 4-bit payload length nibble is used directly as the memcpy size without validating it against the actual CAN data length. A malicious CAN frame with an oversized length nibble can cause memory reads beyond the buffer, allowing attackers to cause a denial of service, or gain sensitive information.
A vulnerability allowing out-of-bounds read has been identified in the openxc isotp-c library, specifically in versions through commit 5a5d19245f65189202719321facd49ce6f5d46ac. The issue arises in the ISO-TP single frame receive handler, where the 4-bit payload length nibble is used directly for memory copying without validating it against the actual CAN data length. This flaw can be exploited by sending a malicious CAN frame with an oversized length nibble, causing memory reads beyond the buffer. As a result, attackers could access sensitive information or cause a denial-of-service condition.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 1, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | CISA-ADP |
Affected Products
No affected product data is available for this CVE.
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | New CVE Received | [email protected] |