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CVE-2026-29013 (GCVE-0-2026-29013)

Vulnerability from nvd – Published: 2026-04-17 21:11 – Updated: 2026-05-25 23:41

Title

libcoap Out-of-Bounds Read in OSCORE CBOR Unwrap Handling

Summary

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.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck

References

1 reference

URL	Tags
https://github.com/obgm/libcoap/commit/b7847c4dbb…	patch

Impacted products

1 product

Vendor	Product	Version
libcoap	libcoap	Affected: 0 , < v4.3.5b (custom)

Date Public

2026-04-17 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.

Show details on NVD website

JSON

To clipboard

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CVE-2025-34468 (GCVE-0-2025-34468)

Vulnerability from nvd – Published: 2025-12-31 18:39 – Updated: 2026-03-23 15:43

Title

libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE

Summary

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).

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck

References

4 references

URL	Tags
https://github.com/obgm/libcoap/pull/1737	issue-tracking
https://github.com/obgm/libcoap/commit/30db3ea	patch
https://libcoap.net/	product
https://www.vulncheck.com/advisories/libcoap-stac…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
libcoap	libcoap	Affected: 0 , ≤ 4.3.5 (semver) Unaffected: 30db3eaa1f0464722ebea2ca2d5084aebfbd344d (git)

Credits

SecMate

Show details on NVD website

JSON

To clipboard

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CVE-2025-59391 (GCVE-0-2025-59391)

Vulnerability from nvd – Published: 2025-12-08 00:00 – Updated: 2025-12-08 17:51

Summary

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.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-125 - Out-of-bounds Read

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/releases/tag/v4.3.5a
https://github.com/obgm/libcoap/pull/1730

Show details on NVD website

JSON

To clipboard

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CVE-2025-65494 (GCVE-0-2025-65494)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:49

Summary

NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1745
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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CVE-2025-65500 (GCVE-0-2025-65500)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1746
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "metrics": [
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 4.3,
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              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-24T18:28:00.838Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "title": "CISA ADP Vulnrichment"
      }
    ],
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CVE-2025-65495 (GCVE-0-2025-65495)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:41

Summary

Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-195 - Signed to Unsigned Conversion Error

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1744
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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  "containers": {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
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              }
            ]
          }
        ],
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          "dateUpdated": "2025-11-24T14:41:15.867Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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      "affected": [
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          "lang": "en",
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        }
      ],
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        "dateUpdated": "2025-11-24T13:58:57.268Z",
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          "url": "https://github.com/obgm/libcoap/issues/1744"
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        {
          "url": "https://github.com/obgm/libcoap/pull/1750"
        }
      ]
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CVE-2025-65498 (GCVE-0-2025-65498)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1746
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
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                    "Technical Impact": "partial"
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                "timestamp": "2025-11-24T18:25:52.920041Z",
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          "dateUpdated": "2025-11-24T18:26:02.539Z",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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      "affected": [
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      ],
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        {
          "lang": "en",
          "value": "NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL."
        }
      ],
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          "descriptions": [
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              "description": "n/a",
              "lang": "en",
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        "dateUpdated": "2025-11-24T13:59:00.377Z",
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          "url": "https://github.com/obgm/libcoap/issues/1746"
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          "url": "https://github.com/obgm/libcoap/pull/1750"
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CVE-2025-65501 (GCVE-0-2025-65501)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28

Summary

Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1748
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
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              "scope": "UNCHANGED",
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        ],
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        },
        "title": "CISA ADP Vulnrichment"
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    ],
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        "dateUpdated": "2025-11-24T13:59:04.989Z",
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CVE-2025-65497 (GCVE-0-2025-65497)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1745
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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        ],
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          "dateUpdated": "2025-11-24T18:26:23.934Z",
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        },
        "title": "CISA ADP Vulnrichment"
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    ],
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        }
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        "dateUpdated": "2025-11-24T13:58:59.120Z",
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          "url": "https://github.com/obgm/libcoap/issues/1745"
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          "url": "https://github.com/obgm/libcoap/pull/1750"
        }
      ]
    }
  },
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    "cveId": "CVE-2025-65497",
    "datePublished": "2025-11-24T00:00:00.000Z",
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  },
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CVE-2025-65499 (GCVE-0-2025-65499)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:27

Summary

Array index error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_ex_data_X509_STORE_CTX_idx() to return -1.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-129 - Improper Validation of Array Index

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1747
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
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        ],
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                "cweId": "CWE-129",
                "description": "CWE-129 Improper Validation of Array Index",
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              }
            ]
          }
        ],
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          "dateUpdated": "2025-11-24T18:27:33.150Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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CVE-2025-65493 (GCVE-0-2025-65493)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:53

Summary

NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS connection that triggers BIO_get_data() to return NULL.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1743
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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CVE-2025-65496 (GCVE-0-2025-65496)

Vulnerability from nvd – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1745
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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CVE-2024-31031 (GCVE-0-2024-31031)

Vulnerability from nvd – Published: 2024-04-17 00:00 – Updated: 2025-11-04 22:06

Summary

An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

5 references

URL	Tags
https://github.com/obgm/libcoap/issues/1351
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

1 product

Vendor	Product	Version
libcoap	libcoap	Affected: 4.3.4 cpe:2.3:a:libcoap:libcoap:4.3.4:::::::*

Show details on NVD website

JSON

To clipboard

{
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CVE-2024-0962 (GCVE-0-2024-0962)

Vulnerability from nvd – Published: 2024-01-27 12:31 – Updated: 2025-06-17 21:29

Title

obgm libcoap Configuration File coap_oscore.c get_split_entry stack-based overflow

Summary

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.

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

6.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulDB

References

5 references

URL	Tags
https://vuldb.com/?id.252206	vdb-entrytechnical-description
https://vuldb.com/?ctiid.252206	signaturepermissions-required
https://github.com/obgm/libcoap/issues/1310	issue-tracking
https://github.com/obgm/libcoap/issues/1310#issue…	exploitissue-tracking
https://github.com/obgm/libcoap/pull/1311	issue-trackingpatch

Impacted products

1 product

Vendor	Product	Version
obgm	libcoap	Affected: 4.3.4

Credits

MSXF (VulDB User)

Show details on NVD website

JSON

To clipboard

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CVE-2023-30362 (GCVE-0-2023-30362)

Vulnerability from nvd – Published: 2023-06-23 00:00 – Updated: 2024-12-05 16:59

Summary

Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1063
https://github.com/obgm/libcoap/pull/1065

Show details on NVD website

JSON

To clipboard

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CVE-2026-29013 (GCVE-0-2026-29013)

Vulnerability from cvelistv5 – Published: 2026-04-17 21:11 – Updated: 2026-05-25 23:41

Title

libcoap Out-of-Bounds Read in OSCORE CBOR Unwrap Handling

Summary

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.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck

References

1 reference

URL	Tags
https://github.com/obgm/libcoap/commit/b7847c4dbb…	patch

Impacted products

1 product

Vendor	Product	Version
libcoap	libcoap	Affected: 0 , < v4.3.5b (custom)

Date Public

2026-04-17 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.

Show details on NVD website

JSON

To clipboard

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CVE-2025-34468 (GCVE-0-2025-34468)

Vulnerability from cvelistv5 – Published: 2025-12-31 18:39 – Updated: 2026-03-23 15:43

Title

libcoap Stack-Based Buffer Overflow in Address Resolution DoS or Potential RCE

Summary

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).

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck

References

4 references

URL	Tags
https://github.com/obgm/libcoap/pull/1737	issue-tracking
https://github.com/obgm/libcoap/commit/30db3ea	patch
https://libcoap.net/	product
https://www.vulncheck.com/advisories/libcoap-stac…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
libcoap	libcoap	Affected: 0 , ≤ 4.3.5 (semver) Unaffected: 30db3eaa1f0464722ebea2ca2d5084aebfbd344d (git)

Credits

SecMate

Show details on NVD website

JSON

To clipboard

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CVE-2025-59391 (GCVE-0-2025-59391)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:00 – Updated: 2025-12-08 17:51

Summary

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.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-125 - Out-of-bounds Read

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/releases/tag/v4.3.5a
https://github.com/obgm/libcoap/pull/1730

Show details on NVD website

JSON

To clipboard

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                    "Technical Impact": "partial"
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              "type": "ssvc"
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          }
        ],
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            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
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              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-08T17:51:29.230Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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          "lang": "en",
          "value": "A memory disclosure vulnerability exists in libcoap\u0027s 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."
        }
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          "url": "https://github.com/obgm/libcoap/releases/tag/v4.3.5a"
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        {
          "url": "https://github.com/obgm/libcoap/pull/1730"
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CVE-2025-65494 (GCVE-0-2025-65494)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:49

Summary

NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1745
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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CVE-2025-65500 (GCVE-0-2025-65500)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1746
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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              "attackComplexity": "LOW",
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        },
        "title": "CISA ADP Vulnrichment"
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CVE-2025-65495 (GCVE-0-2025-65495)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:41

Summary

Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-195 - Signed to Unsigned Conversion Error

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1744
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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            ]
          }
        ],
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          "dateUpdated": "2025-11-24T14:41:15.867Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
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    ],
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          "lang": "en",
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        }
      ],
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          "descriptions": [
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        "dateUpdated": "2025-11-24T13:58:57.268Z",
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          "url": "https://github.com/obgm/libcoap/pull/1750"
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CVE-2025-65498 (GCVE-0-2025-65498)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1746
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
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        },
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    ],
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        "dateUpdated": "2025-11-24T13:59:00.377Z",
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CVE-2025-65501 (GCVE-0-2025-65501)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:28

Summary

Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1748
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
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        ],
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          "dateUpdated": "2025-11-24T18:28:32.203Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "product": "n/a",
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          "lang": "en",
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CVE-2025-65497 (GCVE-0-2025-65497)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1745
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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CVE-2025-65499 (GCVE-0-2025-65499)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:27

Summary

Array index error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_ex_data_X509_STORE_CTX_idx() to return -1.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-129 - Improper Validation of Array Index

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1747
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2025-11-24T18:27:33.150Z",
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        "title": "CISA ADP Vulnrichment"
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          "value": "Array index error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_ex_data_X509_STORE_CTX_idx() to return -1."
        }
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CVE-2025-65493 (GCVE-0-2025-65493)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 14:53

Summary

NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS connection that triggers BIO_get_data() to return NULL.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1743
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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        }
      ],
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        "dateUpdated": "2025-11-24T13:58:50.655Z",
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CVE-2025-65496 (GCVE-0-2025-65496)

Vulnerability from cvelistv5 – Published: 2025-11-24 00:00 – Updated: 2025-11-24 18:26

Summary

NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-476 - NULL Pointer Dereference

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1745
https://github.com/obgm/libcoap/pull/1750

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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    ],
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CVE-2024-31031 (GCVE-0-2024-31031)

Vulnerability from cvelistv5 – Published: 2024-04-17 00:00 – Updated: 2025-11-04 22:06

Summary

An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

5 references

URL	Tags
https://github.com/obgm/libcoap/issues/1351
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

1 product

Vendor	Product	Version
libcoap	libcoap	Affected: 4.3.4 cpe:2.3:a:libcoap:libcoap:4.3.4:::::::*

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:libcoap:libcoap:4.3.4:*:*:*:*:*:*:*"
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            "defaultStatus": "unknown",
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        ],
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          "dateUpdated": "2024-06-04T17:35:56.858Z",
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        "title": "CISA ADP Vulnrichment"
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        "providerMetadata": {
          "dateUpdated": "2025-11-04T22:06:11.163Z",
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          {
            "tags": [
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            "name": "FEDORA-2024-450b75e4a0",
            "tags": [
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            ],
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          },
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CVE-2024-0962 (GCVE-0-2024-0962)

Vulnerability from cvelistv5 – Published: 2024-01-27 12:31 – Updated: 2025-06-17 21:29

Title

obgm libcoap Configuration File coap_oscore.c get_split_entry stack-based overflow

Summary

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.

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

6.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulDB

References

5 references

URL	Tags
https://vuldb.com/?id.252206	vdb-entrytechnical-description
https://vuldb.com/?ctiid.252206	signaturepermissions-required
https://github.com/obgm/libcoap/issues/1310	issue-tracking
https://github.com/obgm/libcoap/issues/1310#issue…	exploitissue-tracking
https://github.com/obgm/libcoap/pull/1311	issue-trackingpatch

Impacted products

1 product

Vendor	Product	Version
obgm	libcoap	Affected: 4.3.4

Credits

MSXF (VulDB User)

Show details on NVD website

JSON

To clipboard

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CVE-2023-30362 (GCVE-0-2023-30362)

Vulnerability from cvelistv5 – Published: 2023-06-23 00:00 – Updated: 2024-12-05 16:59

Summary

Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a

Assigner

mitre

References

2 references

URL	Tags
https://github.com/obgm/libcoap/issues/1063
https://github.com/obgm/libcoap/pull/1065

Show details on NVD website

JSON

To clipboard

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Find a vulnerability

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
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32 vulnerabilities found for libcoap by libcoap

CVE-2026-29013 (GCVE-0-2026-29013)

CVE-2025-34468 (GCVE-0-2025-34468)

CVE-2025-59391 (GCVE-0-2025-59391)

CVE-2025-65494 (GCVE-0-2025-65494)

CVE-2025-65500 (GCVE-0-2025-65500)

CVE-2025-65495 (GCVE-0-2025-65495)

CVE-2025-65498 (GCVE-0-2025-65498)

CVE-2025-65501 (GCVE-0-2025-65501)

CVE-2025-65497 (GCVE-0-2025-65497)

CVE-2025-65499 (GCVE-0-2025-65499)

CVE-2025-65493 (GCVE-0-2025-65493)

CVE-2025-65496 (GCVE-0-2025-65496)

CVE-2024-31031 (GCVE-0-2024-31031)

CVE-2024-0962 (GCVE-0-2024-0962)

CVE-2023-30362 (GCVE-0-2023-30362)

CVE-2026-29013 (GCVE-0-2026-29013)

CVE-2025-34468 (GCVE-0-2025-34468)

CVE-2025-59391 (GCVE-0-2025-59391)

CVE-2025-65494 (GCVE-0-2025-65494)

CVE-2025-65500 (GCVE-0-2025-65500)

CVE-2025-65495 (GCVE-0-2025-65495)

CVE-2025-65498 (GCVE-0-2025-65498)

CVE-2025-65501 (GCVE-0-2025-65501)

CVE-2025-65497 (GCVE-0-2025-65497)

CVE-2025-65499 (GCVE-0-2025-65499)

CVE-2025-65493 (GCVE-0-2025-65493)

CVE-2025-65496 (GCVE-0-2025-65496)

CVE-2024-31031 (GCVE-0-2024-31031)

CVE-2024-0962 (GCVE-0-2024-0962)

CVE-2023-30362 (GCVE-0-2023-30362)

Find a vulnerability

Search criteria ⓘ Use this form to refine search results. Full-text search supports keyword queries with ranking and filtering. You can combine vendor, product, and sources to narrow results. Enable “Apply ordering” to sort by date instead of relevance.

32 vulnerabilities found for libcoap by libcoap

CVE-2026-29013 (GCVE-0-2026-29013)

CVE-2025-34468 (GCVE-0-2025-34468)

CVE-2025-59391 (GCVE-0-2025-59391)

CVE-2025-65494 (GCVE-0-2025-65494)

CVE-2025-65500 (GCVE-0-2025-65500)

CVE-2025-65495 (GCVE-0-2025-65495)

CVE-2025-65498 (GCVE-0-2025-65498)

CVE-2025-65501 (GCVE-0-2025-65501)

CVE-2025-65497 (GCVE-0-2025-65497)

CVE-2025-65499 (GCVE-0-2025-65499)

CVE-2025-65493 (GCVE-0-2025-65493)

CVE-2025-65496 (GCVE-0-2025-65496)

CVE-2024-31031 (GCVE-0-2024-31031)

CVE-2024-0962 (GCVE-0-2024-0962)

CVE-2023-30362 (GCVE-0-2023-30362)

CVE-2026-29013 (GCVE-0-2026-29013)

CVE-2025-34468 (GCVE-0-2025-34468)

CVE-2025-59391 (GCVE-0-2025-59391)

CVE-2025-65494 (GCVE-0-2025-65494)

CVE-2025-65500 (GCVE-0-2025-65500)

CVE-2025-65495 (GCVE-0-2025-65495)

CVE-2025-65498 (GCVE-0-2025-65498)

CVE-2025-65501 (GCVE-0-2025-65501)

CVE-2025-65497 (GCVE-0-2025-65497)

CVE-2025-65499 (GCVE-0-2025-65499)

CVE-2025-65493 (GCVE-0-2025-65493)

CVE-2025-65496 (GCVE-0-2025-65496)

CVE-2024-31031 (GCVE-0-2024-31031)

CVE-2024-0962 (GCVE-0-2024-0962)

CVE-2023-30362 (GCVE-0-2023-30362)

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.