Libcoap
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CVEs (5)
| CVE | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|
| CVE-2025-50518 | Cri | 0.64 | 9.8 | 0.00 | Aug 14, 2025 | A use-after-free vulnerability exists in the coap_delete_pdu_lkd function within coap_pdu.c of the libcoap library. This issue occurs due to improper handling of memory after the freeing of a PDU object, leading to potential memory corruption or the possibility of executing arbitrary code. NOTE: this is disputed by the Supplier because it only occurs when an application uses libcoap incorrectly. | |
| CVE-2026-29013 | Hig | 0.57 | — | 0.00 | Apr 17, 2026 | 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. | |
| CVE-2025-34468 | 0.00 | — | 0.00 | Dec 31, 2025 | libcoap versions up to and including 4.3.5, prior to commit 30db3ea, contain a stack-based buffer overflow in address resolution when attacker-controlled hostname data is copied into a fixed 256-byte stack buffer without proper bounds checking. A remote attacker can trigger a crash and potentially achieve remote code execution depending on compiler options and runtime memory protections. Exploitation requires the proxy logic to be enabled (i.e., the proxy request handling code path in an application using libcoap). | ||
| CVE-2025-59391 | 0.00 | — | 0.00 | Dec 8, 2025 | A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service. | ||
| CVE-2024-0962 | 0.00 | — | 0.00 | Jan 27, 2024 | A vulnerability was found in obgm libcoap 4.3.4. It has been rated as critical. Affected by this issue is the function get_split_entry of the file src/coap_oscore.c of the component Configuration File Handler. The manipulation leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. VDB-252206 is the identifier assigned to this vulnerability. |