Bug 2373301

Summary:	libblockdev allegedly exploitable via the udisks daemon included by default on most Linux distributions, and allows an “allow_active” user to gain full root privileges (CVE-2025-6019)
Product:	[Fedora] Fedora	Reporter:	Timo Trinks <ttrinks>
Component:	udisks2	Assignee:	Tomáš Bžatek <tbzatek>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	42	CC:	gnome-sig, tbzatek, vtrefny
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	x86_64
OS:	Linux
URL:	https://blog.qualys.com/vulnerabilities-threat-research/2025/06/17/qualys-tru-uncovers-chained-lpe-suse-15-pam-to-full-root-via-libblockdev-udisks
Whiteboard:
Fixed In Version:	udisks2-2.10.90-3.fc42	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:
Clones:	2373307 (view as bug list)		Environment:
Last Closed:	2025-06-22 05:59:12 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Timo Trinks 2025-06-18 03:07:24 UTC

The Qualys team discovered [a] LPE vulnerability in libblockdev, trivially exploitable via the udisks daemon, which is installed by default on most Linux distributions: an "allow_active" user (e.g., a physical user, or an attacker who hijacked the session of a physical user) can obtain the full privileges of the root user [1].

[1] https://www.openwall.com/lists/oss-security/2025/06/17/4

Reproducible: Always

Actual Results:
LPE

Expected Results:
Disallow LPE.

Additional Information:
Proposed patches for both udisks and libblockdev [1].

[1] https://www.openwall.com/lists/oss-security/2025/06/17/5

Comment 1 Tomáš Bžatek 2025-06-18 09:04:51 UTC

FYI, the udisks patch was shared privately just for consideration, both the CVEs linked don't describe this udisks vulnerability at all. It's similar, but a slightly different case. Since this has gone public already, we'll take it as a regular patch upstream.

Comment 2 Fedora Update System 2025-06-19 14:36:43 UTC

FEDORA-2025-6ef0c40f95 (udisks2-2.10.90-3.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-6ef0c40f95

Comment 3 Fedora Update System 2025-06-21 02:59:01 UTC

FEDORA-2025-6ef0c40f95 has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-6ef0c40f95`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-6ef0c40f95

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2025-06-22 05:59:12 UTC

FEDORA-2025-6ef0c40f95 (udisks2-2.10.90-3.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.