CVE-2025-6020

Publication date 17 June 2025

Last updated 25 June 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in linux-pam. The module pam_namespace may use access user-controlled paths without proper protection, allowing local users to elevate their privileges to root via multiple symlink attacks and race conditions.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
pam	25.10 questing	Fixed 1.5.3-7ubuntu6
	25.04 plucky	Fixed 1.5.3-7ubuntu4.3
	24.10 oracular	Fixed 1.5.3-7ubuntu2.3
	24.04 LTS noble	Fixed 1.5.3-5ubuntu5.4
	22.04 LTS jammy	Fixed 1.4.0-11ubuntu2.6
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Notes

mdeslaur

pam_namespace not used in default installations

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7580-1
PAM vulnerability
18 June 2025