CVE-2022-4904

Publication date 15 February 2023

Last updated 18 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
c-ares	26.04 LTS resolute	Not affected
	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	Fixed 1.18.1-1ubuntu0.22.10.1
	22.04 LTS jammy	Fixed 1.18.1-1ubuntu0.22.04.1
	20.04 LTS focal	Fixed 1.15.0-1ubuntu0.2
	18.04 LTS bionic	Fixed 1.14.0-1ubuntu0.2
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

Patch details

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

Package	Patch details
c-ares	Upstream: 9903253

Severity score breakdown

Parameter	Value
Base score	8.6 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References

Related Ubuntu Security Notices (USN)

USN-5907-1
c-ares vulnerability
2 March 2023