CVE-2021-31239

Publication date 9 May 2023

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue found in SQLite SQLite3 v.3.35.4 that allows a remote attacker to cause a denial of service via the appendvfs.c function.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
sqlite	23.04 lunar	Not in release
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
sqlite3	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

rodrigo-zaiden

appendvfs extension was added in version 3.22 (check-in https://www.sqlite.org/src/info/063a03a3) and the issue was likely introduced in version 3.35.2 (check-in https://www.sqlite.org/src/info/25c3186a).

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
sqlite3	Upstream: https://www.sqlite.org/src/info/04f6439f4d9b9b1f

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H