CVE-2026-37535

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.

PUBLISHED Reserved 2026-04-06 | Published 2026-05-01 | Updated 2026-05-01 | Assigner mitre

References

github.com/openxc/isotp-c

github.com/openxc/isotp-c/blob/master/src/isotp/receive.c

gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381

cve.org (CVE-2026-37535)

nvd.nist.gov (CVE-2026-37535)

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