CVE-2018-16840 (GCVE-0-2018-16840)

Vulnerability from cvelistv5 – Published: 2018-10-31 18:00 – Updated: 2026-04-16 14:08
VLAI
Summary
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
Severity
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
The Curl Project curl Affected: from 7.59.0 to 7.61.1
Create a notification for this product.
Date Public
2018-10-31 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T10:32:53.993Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "GLSA-201903-03",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/201903-03"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"
          },
          {
            "name": "1042013",
            "tags": [
              "vdb-entry",
              "x_refsource_SECTRACK",
              "x_transferred"
            ],
            "url": "http://www.securitytracker.com/id/1042013"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"
          },
          {
            "name": "USN-3805-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3805-1/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2018-16840",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-16T14:08:48.093326Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-16T14:08:57.315Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "curl",
          "vendor": "The Curl Project",
          "versions": [
            {
              "status": "affected",
              "version": "from 7.59.0 to 7.61.1"
            }
          ]
        }
      ],
      "datePublic": "2018-10-31T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an \u0027easy\u0027 handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-03-11T09:57:01.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "GLSA-201903-03",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/201903-03"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"
        },
        {
          "name": "1042013",
          "tags": [
            "vdb-entry",
            "x_refsource_SECTRACK"
          ],
          "url": "http://www.securitytracker.com/id/1042013"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"
        },
        {
          "name": "USN-3805-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/3805-1/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2018-16840",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "curl",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "from 7.59.0 to 7.61.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "The Curl Project"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an \u0027easy\u0027 handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct."
            }
          ]
        },
        "impact": {
          "cvss": [
            [
              {
                "vectorString": "4.3/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
                "version": "3.0"
              }
            ]
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-416"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "GLSA-201903-03",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/201903-03"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840",
              "refsource": "CONFIRM",
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840"
            },
            {
              "name": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f",
              "refsource": "CONFIRM",
              "url": "https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f"
            },
            {
              "name": "1042013",
              "refsource": "SECTRACK",
              "url": "http://www.securitytracker.com/id/1042013"
            },
            {
              "name": "https://curl.haxx.se/docs/CVE-2018-16840.html",
              "refsource": "MISC",
              "url": "https://curl.haxx.se/docs/CVE-2018-16840.html"
            },
            {
              "name": "USN-3805-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/3805-1/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2018-16840",
    "datePublished": "2018-10-31T18:00:00.000Z",
    "dateReserved": "2018-09-11T00:00:00.000Z",
    "dateUpdated": "2026-04-16T14:08:57.315Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2018-16840",
      "date": "2026-05-27",
      "epss": "0.0029",
      "percentile": "0.52482"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-16840\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2018-10-31T18:29:00.307\",\"lastModified\":\"2025-04-17T13:05:04.557\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an \u0027easy\u0027 handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.\"},{\"lang\":\"es\",\"value\":\"Se ha detectado un error de uso de memoria din\u00e1mica (heap) previamente liberada en Curl, desde la versi\u00f3n 7.59.0 hasta la 7.61.1, en el c\u00f3digo relacionado con el cierre de un controlador \\\"easy\\\". Al cerrar y limpiar un controlador \\\"easy\\\" en la funci\u00f3n \\\"Curl_close()\\\", el c\u00f3digo de la biblioteca libera, en primer lugar, un struct (sin pasar el puntero a null) y, despu\u00e9s, podr\u00eda escribir err\u00f3neamente en un campo struct dentro del struct ya liberado.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"cvssMetricV30\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":7.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":10.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.59.0\",\"versionEndExcluding\":\"7.62.0\",\"matchCriteriaId\":\"BA39901D-8EE5-4B6F-A0D3-43522D998003\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"B5A6F2F3-4894-4392-8296-3B8DD2679084\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07C312A0-CD2C-4B9C-B064-6409B25C278F\"}]}]}],\"references\":[{\"url\":\"http://www.securitytracker.com/id/1042013\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://curl.haxx.se/docs/CVE-2018-16840.html\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/201903-03\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3805-1/\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://www.securitytracker.com/id/1042013\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://curl.haxx.se/docs/CVE-2018-16840.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/201903-03\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3805-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://security.gentoo.org/glsa/201903-03\", \"name\": \"GLSA-201903-03\", \"tags\": [\"vendor-advisory\", \"x_refsource_GENTOO\", \"x_transferred\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"http://www.securitytracker.com/id/1042013\", \"name\": \"1042013\", \"tags\": [\"vdb-entry\", \"x_refsource_SECTRACK\", \"x_transferred\"]}, {\"url\": \"https://curl.haxx.se/docs/CVE-2018-16840.html\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://usn.ubuntu.com/3805-1/\", \"name\": \"USN-3805-1\", \"tags\": [\"vendor-advisory\", \"x_refsource_UBUNTU\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-05T10:32:53.993Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2018-16840\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-16T14:08:48.093326Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-16T14:08:53.378Z\"}}], \"cna\": {\"metrics\": [{\"cvssV3_0\": {\"scope\": \"UNCHANGED\", \"version\": \"3.0\", \"baseScore\": 4.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"The Curl Project\", \"product\": \"curl\", \"versions\": [{\"status\": \"affected\", \"version\": \"from 7.59.0 to 7.61.1\"}]}], \"datePublic\": \"2018-10-31T00:00:00.000Z\", \"references\": [{\"url\": \"https://security.gentoo.org/glsa/201903-03\", \"name\": \"GLSA-201903-03\", \"tags\": [\"vendor-advisory\", \"x_refsource_GENTOO\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"http://www.securitytracker.com/id/1042013\", \"name\": \"1042013\", \"tags\": [\"vdb-entry\", \"x_refsource_SECTRACK\"]}, {\"url\": \"https://curl.haxx.se/docs/CVE-2018-16840.html\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://usn.ubuntu.com/3805-1/\", \"name\": \"USN-3805-1\", \"tags\": [\"vendor-advisory\", \"x_refsource_UBUNTU\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an \u0027easy\u0027 handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2019-03-11T09:57:01.000Z\"}, \"x_legacyV4Record\": {\"impact\": {\"cvss\": [[{\"version\": \"3.0\", \"vectorString\": \"4.3/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N\"}]]}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"from 7.59.0 to 7.61.1\"}]}, \"product_name\": \"curl\"}]}, \"vendor_name\": \"The Curl Project\"}]}}, \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://security.gentoo.org/glsa/201903-03\", \"name\": \"GLSA-201903-03\", \"refsource\": \"GENTOO\"}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840\", \"name\": \"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f\", \"name\": \"https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f\", \"refsource\": \"CONFIRM\"}, {\"url\": \"http://www.securitytracker.com/id/1042013\", \"name\": \"1042013\", \"refsource\": \"SECTRACK\"}, {\"url\": \"https://curl.haxx.se/docs/CVE-2018-16840.html\", \"name\": \"https://curl.haxx.se/docs/CVE-2018-16840.html\", \"refsource\": \"MISC\"}, {\"url\": \"https://usn.ubuntu.com/3805-1/\", \"name\": \"USN-3805-1\", \"refsource\": \"UBUNTU\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an \u0027easy\u0027 handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-416\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2018-16840\", \"STATE\": \"PUBLIC\", \"ASSIGNER\": \"secalert@redhat.com\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2018-16840\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-16T14:08:57.315Z\", \"dateReserved\": \"2018-09-11T00:00:00.000Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2018-10-31T18:00:00.000Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.