Bug 2373307

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:	Vojtech Trefny <vtrefny>
Component:	libblockdev	Assignee:	Vojtech Trefny <vtrefny>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	extras-qa, gnome-sig, tbzatek, ttrinks, v.podzimek+fedora, 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:	libblockdev-3.3.1-1.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:	2373301	Environment:
Last Closed:	2025-06-18 10:58:44 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 Vojtech Trefny 2025-06-18 07:35:08 UTC

+++ This bug was initially created as a clone of Bug #2373301 +++

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 Fedora Update System 2025-06-18 08:00:56 UTC

FEDORA-2025-af7ba2696c (libblockdev-3.3.1-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-af7ba2696c

Comment 2 Fedora Update System 2025-06-18 08:05:13 UTC

FEDORA-2025-4f28b95d7e (libblockdev-3.2.2-1.fc41) has been submitted as an update to Fedora 41.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-4f28b95d7e

Comment 3 Fedora Update System 2025-06-19 01:43:55 UTC

FEDORA-2025-af7ba2696c 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-af7ba2696c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-af7ba2696c

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

Comment 4 Fedora Update System 2025-06-19 02:24:09 UTC

FEDORA-2025-4f28b95d7e has been pushed to the Fedora 41 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-4f28b95d7e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-4f28b95d7e

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

Comment 5 Fedora Update System 2025-06-21 01:27:32 UTC

FEDORA-2025-af7ba2696c (libblockdev-3.3.1-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2025-06-21 02:12:31 UTC

FEDORA-2025-4f28b95d7e (libblockdev-3.2.2-1.fc41) has been pushed to the Fedora 41 stable repository.
If problem still persists, please make note of it in this bug report.