CVE-2022-38178

Publication date 21 September 2022

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
bind9	22.10 kinetic	Fixed 1:9.18.4-2ubuntu2
	22.04 LTS jammy	Fixed 1:9.18.1-1ubuntu1.2
	20.04 LTS focal	Fixed 1:9.16.1-0ubuntu2.11
	18.04 LTS bionic	Fixed 1:9.11.3+dfsg-1ubuntu1.18
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
isc-dhcp	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

alexmurray

As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs

leosilva

versions affected: 9.9.12 - 9.9.13, 9.10.7 - 9.10.8, 9.18.0 - 9.18.6, 9.19.0 - 9.19.4.

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