CVE-2020-22217

Publication date 22 August 2023

Last updated 18 August 2025

Ubuntu priority

Cvss 3 Severity Score

Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.

Only an out-of-bounds read, so denial of service only

Show unmaintained releases

Package	Ubuntu Release	Status
c-ares	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
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Fixed 1.15.0-1ubuntu0.4
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Ignored end of standard support

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

Package	Patch details
c-ares	Upstream: 1b98172