CVE-2025-6297

Publication date 1 July 2025

Last updated 24 September 2025

Ubuntu priority

Cvss 3 Severity Score

Description

It was discovered that dpkg-deb does not properly sanitize directory permissions when extracting a control member into a temporary directory, which is documented as being a safe operation even on untrusted data. This may result in leaving temporary files behind on cleanup. Given automated and repeated execution of dpkg-deb commands on adversarial .deb packages or with well compressible files, placed inside a directory with permissions not allowing removal by a non-root user, this can end up in a DoS scenario due to causing disk quota exhaustion or disk full conditions.

Read the notes from the security team

Why is this CVE low priority?

Only leaves temp files around when manually extracting a deb file

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
dpkg	25.10 questing	Fixed 1.22.21ubuntu1
	25.04 plucky	Fixed 1.22.18ubuntu2.2
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 1.22.6ubuntu6.5
	22.04 LTS jammy	Fixed 1.21.1ubuntu2.6
	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

This issue only results in temporary files being left behind when manually extracting deb packages with the dpkg-deb tool. Contrary to the CVSS score, this is a rather unimportant issue. Marking as low priority.

Patch details

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

Package	Patch details
dpkg	Upstream: ?id=ed6 Upstream: ?id=98c

Severity score breakdown

Parameter	Value
Base score	8.2 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N