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 out-of-bounds reads through integer wraparound in allocation size computation.
References
| Link | Resource |
|---|---|
| https://github.com/obgm/libcoap/commit/b7847c4dbb0dbee7c90b09a673d4cae256f03718 | Patch |
Configurations
History
02 Jun 2026, 16:23
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/obgm/libcoap/commit/b7847c4dbb0dbee7c90b09a673d4cae256f03718 - Patch | |
| CPE | cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 9.8 |
| First Time |
Libcoap libcoap
Libcoap |
26 May 2026, 00:16
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) 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 out-of-bounds reads through integer wraparound in allocation size computation. |
20 Apr 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
17 Apr 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-17 22:16
Updated : 2026-06-17 10:29
NVD link : CVE-2026-29013
Mitre link : CVE-2026-29013
CVE.ORG link : CVE-2026-29013
JSON object : View
Products Affected
libcoap
- libcoap
CWE
CWE-125
Out-of-bounds Read