CVE-2020-13871Public exploitNetwork attack vector

Service interruption via late window-function tree rewrite

Published Jun 6, 2020 · Updated Aug 4, 2024

Use-after-free in resetAccumulator in SQLite 3.32.2 allows remote attackers to interrupt applications with malicious SQL. The resetAccumulator routine accesses freed parse-tree memory because the window-function parse-tree rewrite executes too late. Exploitation requires an application to accept and execute attacker-controlled SQL; the documented impact is limited to availability.

CVSS severity7.5
High
EPSS probability4.45%
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 resetAccumulator in SQLite 3.32.2 allows remote attackers to interrupt applications with malicious SQL. The resetAccumulator routine accesses freed parse-tree memory because the window-function parse-tree rewrite executes too late. Exploitation requires an application to accept and execute attacker-controlled SQL; the documented impact is limited to availability.

The record

CVE
CVE-2020-13871
Published
Jun 6, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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

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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