CVE-2022-48560Public exploitNetwork attack vector

Interpreter crash via unreferenced heap comparison

Published Aug 22, 2023 · Updated Aug 3, 2024

Use-after-free in Python 3.9.0a1 through 3.9.0a2 allows attackers to crash the interpreter through heapq.heappushpop. The C implementation calls an element's custom lt method without holding a strong reference, then reuses the top item after that callback clears or mutates the heap. Triggering the crash requires executing Python code that supplies a heap element with a comparison method capable of modifying the heap; affected production releases are 3.8.0 through 3.8.1, 3.7.0 through 3.7.6, and 3.6.10 and earlier.

CVSS severity7.5
High
EPSS probability1.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Python 3.9.0a1 through 3.9.0a2 allows attackers to crash the interpreter through heapq.heappushpop. The C implementation calls an element's custom lt method without holding a strong reference, then reuses the top item after that callback clears or mutates the heap. Triggering the crash requires executing Python code that supplies a heap element with a comparison method capable of modifying the heap; affected production releases are 3.8.0 through 3.8.1, 3.7.0 through 3.7.6, and 3.6.10 and earlier.

The record

CVE
CVE-2022-48560
Published
Aug 22, 2023
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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