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CVE-2016-5421 (GCVE-0-2016-5421)

Vulnerability from cvelistv5 – Published: 2016-08-10 14:00 – Updated: 2024-08-06 01:01
VLAI
Summary
Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
Date Public
2016-08-03 00:00
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      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2016-5421\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2016-08-10T14:59:06.330\",\"lastModified\":\"2026-05-06T22:30:45.220\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.\"},{\"lang\":\"es\",\"value\":\"Vulnerabilidad de uso despu\u00e9s de liberaci\u00f3n de memoria en libcurl en versiones anteriores a 7.50.1 permite a atacantes controlar qu\u00e9 conexi\u00f3n es usada o posiblemente tener otros impactos no especificados a trav\u00e9s de vectores 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T21:58:01+00:00",
      "cve": "CVE-2016-5421",
      "id": "CVE-2016-5421",
      "initial_release_date": "2016-08-03T00:00:00+00:00",
      "product_status:fixed": "336",
      "product_status:known_affected": "9",
      "product_status:known_not_affected": "10",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "curl: Use of connection struct after free",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-5421.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T02:14:56Z",
      "cve": "CVE-2016-5421",
      "id": "CVE-2016-5421",
      "initial_release_date": "2023-02-15T05:00:39Z",
      "product_status:known_not_affected": "45",
      "product_status:recommended": "93",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2016-5421",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-5421.json",
      "version": "17"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.