Vulnerability-Lookup

CVE-2024-9979 (GCVE-0-2024-9979)

Vulnerability from cvelistv5 – Published: 2024-10-15 14:01 – Updated: 2025-11-20 19:59

Title

Pyo3: risk of use-after-free in `borrowed` reads from python weak references

Summary

A flaw was found in PyO3. This vulnerability causes a use-after-free issue, potentially leading to memory corruption or crashes via unsound borrowing from weak Python references.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-15 14:19 UTC

CWE

CWE-416 - Use After Free

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1082 records in the last 180 days details

References

5 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2024-9979	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2318646	issue-trackingx_refsource_REDHAT
https://crates.io/crates/pyo3
https://github.com/PyO3/pyo3/pull/4590
https://rustsec.org/advisories/RUSTSEC-2024-0378.html

Impacted products

5 products

Vendor	Product	Version
		Affected: 0.22.0 , < 0.22.4 (semver)
Red Hat	Red Hat Ansible Automation Platform 2	cpe:/a:redhat:ansible_automation_platform:2
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2024-10-12 12:00

Show details on NVD website

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To clipboard

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}

FKIE_CVE-2024-9979

Vulnerability from fkie_nvd - Published: 2024-10-15 14:15 - Updated: 2026-06-17 08:25

Severity

5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

A flaw was found in PyO3. This vulnerability causes a use-after-free issue, potentially leading to memory corruption or crashes via unsound borrowing from weak Python references.

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2024-9979
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2318646
	secalert@redhat.com	https://crates.io/crates/pyo3
	secalert@redhat.com	https://github.com/PyO3/pyo3/pull/4590
	secalert@redhat.com	https://rustsec.org/advisories/RUSTSEC-2024-0378.html

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/PyO3/pyo3",
          "defaultStatus": "unaffected",
          "packageName": "pyo3",
          "versions": [
            {
              "lessThan": "0.22.4",
              "status": "affected",
              "version": "0.22.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python3.11-nh3",
          "product": "Red Hat Ansible Automation Platform 2",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python3.11-rpds-py",
          "product": "Red Hat Ansible Automation Platform 2",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "python-rpds-py",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python3.11-cryptography",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python3.12-cryptography",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python3.11-cryptography",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python3.12-cryptography",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in PyO3. This vulnerability causes a use-after-free issue, potentially leading to memory corruption or crashes via unsound borrowing from weak Python references."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en PyO3. Esta vulnerabilidad provoca un problema de use-after-free, que puede provocar da\u00f1os en la memoria o fallas debido a un pr\u00e9stamo incorrecto de referencias d\u00e9biles de Python."
    }
  ],
  "id": "CVE-2024-9979",
  "lastModified": "2026-06-17T08:25:38.010",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.4,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-9979",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-10-15T14:19:04.359472Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-10-15T14:15:05.817",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2024-9979"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2318646"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://crates.io/crates/pyo3"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://github.com/PyO3/pyo3/pull/4590"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0378.html"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-6JGW-RGMM-7CV6

Vulnerability from github – Published: 2024-10-15 15:30 – Updated: 2024-10-15 17:04

Summary

PyO3 has a risk of use-after-free in `borrowed` reads from Python weak references

Details

The family of functions to read "borrowed" values from Python weak references were fundamentally unsound, because the weak reference does itself not have ownership of the value. At any point the last strong reference could be cleared and the borrowed value would become dangling.

In PyO3 0.22.4 these functions have all been deprecated and patched to leak a strong reference as a mitigation. PyO3 0.23 will remove these functions entirely.

Severity

5.3 (Medium)


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

4.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "pyo3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-9979"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-15T17:04:56Z",
    "nvd_published_at": "2024-10-15T14:15:05Z",
    "severity": "MODERATE"
  },
  "details": "The family of functions to read \"borrowed\" values from Python weak references were fundamentally unsound, because the weak reference does itself not have ownership of the value. At any point the last strong reference could be cleared and the borrowed value would become dangling.\n\nIn PyO3 0.22.4 these functions have all been deprecated and patched to leak a strong reference as a mitigation. PyO3 0.23 will remove these functions entirely.",
  "id": "GHSA-6jgw-rgmm-7cv6",
  "modified": "2024-10-15T17:04:56Z",
  "published": "2024-10-15T15:30:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-9979"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PyO3/pyo3/pull/4590"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2024-9979"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2318646"
    },
    {
      "type": "WEB",
      "url": "https://crates.io/crates/pyo3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/PyO3/pyo3"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0378.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": " PyO3 has a risk of use-after-free in `borrowed` reads from Python weak references"
}

RUSTSEC-2024-0378 (CVE-2024-9979)

Vulnerability from osv_rustsec – Published: 2024-10-12 12:00 – Updated: 2025-10-28 06:02 – Source website

Summary

Risk of use-after-free in `borrowed` reads from Python weak references

Details

In PyO3 0.22.4 these functions have all been deprecated and patched to leak a strong reference as a mitigation. PyO3 0.23 will remove these functions entirely.

References

URL

Type

	https://crates.io/crates/pyo3	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2024-0378.html	ADVISORY
	https://github.com/PyO3/pyo3/pull/4590	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "pyo3::types::PyWeakrefMethods::get_object_borrowed",
            "pyo3::types::PyWeakrefMethods::upgrade_borrowed",
            "pyo3::types::PyWeakrefMethods::upgrade_borrowed_as",
            "pyo3::types::PyWeakrefMethods::upgrade_borrowed_as_exact",
            "pyo3::types::PyWeakrefMethods::upgrade_borrowed_as_unchecked"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "pyo3",
        "purl": "pkg:cargo/pyo3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2024-9979",
    "GHSA-6jgw-rgmm-7cv6"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The family of functions to read \"borrowed\" values from Python weak references\nwere fundamentally unsound, because the weak reference does itself not have\nownership of the value. At any point the last strong reference could\nbe cleared and the borrowed value would become dangling.\n\nIn PyO3 0.22.4 these functions have all been deprecated and patched to leak a\nstrong reference as a mitigation. PyO3 0.23 will remove these functions entirely.",
  "id": "RUSTSEC-2024-0378",
  "modified": "2025-10-28T06:02:18Z",
  "published": "2024-10-12T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/pyo3"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0378.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PyO3/pyo3/pull/4590"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Risk of use-after-free in `borrowed` reads from Python weak references"
}

UBUNTU-CVE-2024-9979 (CVE-2024-9979)

Vulnerability from osv_ubuntu – Published: 2024-10-15 14:15 – Updated: 2025-09-08 16:58 – Source website

Withdrawn 2026-02-09

Details

A flaw was found in PyO3. This vulnerability causes a use-after-free issue, potentially leading to memory corruption or crashes via unsound borrowing from weak Python references.

Severity

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2024-9979	REPORT
	https://www.cve.org/CVERecord?id=CVE-2024-9979	REPORT
	https://github.com/PyO3/pyo3/pull/4590	REPORT
	https://rustsec.org/advisories/RUSTSEC-2024-0378.html	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librust-pyo3-dev",
            "binary_version": "0.20.2-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rust-pyo3",
        "purl": "pkg:deb/ubuntu/rust-pyo3@0.20.2-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.19.0-3",
        "0.19.2-1",
        "0.20.2-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in PyO3. This vulnerability causes a use-after-free issue, potentially leading to memory corruption or crashes via unsound borrowing from weak Python references.",
  "id": "UBUNTU-CVE-2024-9979",
  "modified": "2025-09-08T16:58:57Z",
  "published": "2024-10-15T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-9979"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-9979"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/PyO3/pyo3/pull/4590"
    },
    {
      "type": "REPORT",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0378.html"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-9979"
  ],
  "withdrawn": "2026-02-09T05:12:28Z"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2024-9979 (GCVE-0-2024-9979)

FKIE_CVE-2024-9979

GHSA-6JGW-RGMM-7CV6

RUSTSEC-2024-0378 (CVE-2024-9979)

UBUNTU-CVE-2024-9979 (CVE-2024-9979)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour