CVE-2020-14040

Publication date 17 June 2020

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The x/text package before 0.3.3 for Go has a vulnerability in encoding/unicode that could lead to the UTF-16 decoder entering an infinite loop, causing the program to crash or run out of memory. An attacker could provide a single byte to a UTF16 decoder instantiated with UseBOM or ExpectBOM to trigger an infinite loop if the String function on the Decoder is called, or the Decoder is passed to golang.org/x/text/transform.String.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
golang-x-text	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Ignored transition package that install golang-golang-x-text
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Fixed 0.0~git20170627.0.6353ef0-1ubuntu2.1
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Not in release
golang-golang-x-text	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Fixed 0.3.5-1
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 0.3.2-4ubuntu0.1
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Patch details

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

Package	Patch details
golang-x-text	Upstream: https://go.googlesource.com/text/+/23ae387dee1f90d29a23c0e87ee0b46038fbed0e%5E%21/#F0
golang-golang-x-text	Upstream: 23ae387

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

References

Related Ubuntu Security Notices (USN)

USN-5873-1
Go Text vulnerabilities
16 February 2023