Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381
- https://github.com/openxc/isotp-c
- https://github.com/openxc/isotp-c/blob/master/src/isotp/receive.c
FAQ
What is CVE-2026-37535?
CVE-2026-37535 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 use...
How severe is CVE-2026-37535?
CVE-2026-37535 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-37535?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.