---
id: CVE-2022-48560
title: A use-after-free exists in Python through 3.9 via heappushpop in heapq.
summary: A use-after-free exists in Python through 3.9 via heappushpop in heapq.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-416
vendor: python
product: python
affected:
  - python < 3.6.11
  - 'python >= 3.7.0, < 3.7.7'
  - 'python >= 3.8.0, < 3.8.2'
  - python = 3.9.0
  - debian_linux = 10.0
patched:
  - python 3.8.2
published: '2023-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:16:56.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-48560'
references:
  - url: 'https://bugs.python.org/issue39421'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00017.html'
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZ5OOBWNYWXFTZDMCGHJVGDLDTHLWITJ/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VO7Y2YZSDK3UYJD2KBGLXRTGNG6T326J/
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20230929-0008/'
    label: cve@mitre.org
  - url: 'https://bugs.python.org/issue39421'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00017.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZ5OOBWNYWXFTZDMCGHJVGDLDTHLWITJ/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VO7Y2YZSDK3UYJD2KBGLXRTGNG6T326J/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JZ5OOBWNYWXFTZDMCGHJVGDLDTHLWITJ/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VO7Y2YZSDK3UYJD2KBGLXRTGNG6T326J/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230929-0008/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.01771
epssPercentile: 0.77704
ingestedAt: '2026-10-14T19:49:57.531Z'
---

## Overview

A use-after-free exists in Python through 3.9 via heappushpop in heapq.

## Affected

- `python < 3.6.11`
- `python >= 3.7.0, < 3.7.7`
- `python >= 3.8.0, < 3.8.2`
- `python = 3.9.0`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `python 3.8.2`