Vulnerability Description
libcoap contains out-of-bounds read vulnerabilities in OSCORE Appendix B.2 CBOR unwrap handling where get_byte_inc() in src/oscore/oscore_cbor.c relies solely on assert() for bounds checking, which is removed in release builds compiled with NDEBUG. Attackers can send crafted CoAP requests with malformed OSCORE options or responses during OSCORE negotiation to trigger out-of-bounds reads during CBOR parsing and potentially cause heap buffer overflow writes through integer wraparound in allocation size computation.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-29013?
CVE-2026-29013 is a documented vulnerability. libcoap contains out-of-bounds read vulnerabilities in OSCORE Appendix B.2 CBOR unwrap handling where get_byte_inc() in src/oscore/oscore_cbor.c relies solely on assert() for bounds checking, which is...
How severe is CVE-2026-29013?
CVSS scoring is not yet available for CVE-2026-29013. Check NVD for updates.
Is there a patch for CVE-2026-29013?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.