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FKIE_CVE-2025-50518

Vulnerability from fkie_nvd - Published: 2025-08-14 16:15 - Updated: 2026-06-17 09:35
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
cve@mitre.orghttps://github.com/IreneTheITCrowd/blog/blob/main/libcoap-vulnerability.md
cve@mitre.orghttps://github.com/IreneTheITCrowd/blog/issues/1
cve@mitre.orghttps://github.com/obgm/libcoap/issues/1724#issuecomment-3199631257
cve@mitre.orghttps://github.com/obgm/libcoap/issues/1724#issuecomment-3234613482
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "disputed"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de use-after-free en la funci\u00f3n coap_delete_pdu_lkd, dentro de coap_pdu.c de la librer\u00eda libcoap. Este problema se produce debido a un manejo inadecuado de la memoria tras la liberaci\u00f3n de un objeto PDU, lo que puede provocar corrupci\u00f3n de memoria o la ejecuci\u00f3n de c\u00f3digo arbitrario."
    }
  ],
  "id": "CVE-2025-50518",
  "lastModified": "2026-06-17T09:35:08.873",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-50518",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-08-15T12:37:01.113004Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-08-14T16:15:35.417",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/IreneTheITCrowd/blog/blob/main/libcoap-vulnerability.md"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/IreneTheITCrowd/blog/issues/1"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/obgm/libcoap/issues/1724#issuecomment-3199631257"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/obgm/libcoap/issues/1724#issuecomment-3234613482"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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