PT-2026-36509 · Openxc · Isotp-C

Feng Ning · Published 2026-05-01 · Updated 2026-05-07 · CVE-2026-37535

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AC:L/AV:A/A:H/C:L/I:N/PR:N/S:U/UI:N

Name of the Vulnerable Software and Affected Versions openxc/isotp-c versions prior to commit 5a5d19245f65189202719321facd49ce6f5d46ac

Description An out-of-bounds read exists in the ISO-TP Single Frame receive handler. The issue occurs because the 4-bit payload length nibble is used directly as the memcpy size without validation against the actual CAN data length. A malicious CAN frame with an oversized length nibble can trigger memory reads beyond the buffer, potentially leading to a denial of service or the exposure of sensitive information.

Recommendations Update to a version of openxc/isotp-c released after commit 5a5d19245f65189202719321facd49ce6f5d46ac.

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-37535

Affected Products

Isotp-C

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-37535 · Security Note
• https://github.com/openxc/isotp-c/blob/master/src/isotp/receive.c · Note
• https://github.com/openxc/isotp-c · Note
• https://t.me/CVEtracker/52434 · Telegram Post
• https://gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381 · Note
• https://twitter.com/CVEnew/status/2050269603058655272 · Twitter Post
• https://t.me/cveNotify/162572 · Telegram Post
• https://twitter.com/infoflowcloud/status/2050270568151163077 · Twitter Post