CVE-2025-6019
Libblockdev: lpe from allow_active to root in libblockdev via udisks
Description
A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the "allow_active" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an "allow_active" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation. However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system.
INFO
Published Date :
June 19, 2025, 12:15 p.m.
Last Modified :
July 10, 2025, 2:15 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-6019
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update libblockdev to the latest version.
- Apply system patches for udisks.
- Review Polkit configurations for 'allow_active' settings.
- Avoid mounting untrusted filesystem images.
Public PoC/Exploit Available at Github
CVE-2025-6019 has a 34 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-6019.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-6019 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-6019
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Privilege escalation exploit chain (CVE-2025-6018 + CVE-2025-6019) for openSUSE Leap 15.6
Shell
CVE-2025-6019: udisks2 XFS Resize TOCTOU Privilege Escalation
Python Shell
None
Shell
Vulnerability chaining leads to privilege escalation
CVE-2025-6018 CVE-2025-6019 PoC Exploit - Local Privilege Escalation in openSUSE/SUSE Linux Enterprise 15 - PAM bypass + udisks2 XFS race condition LPE to root
cve-2025-6018 cve-2025-6019 hacking linux-shell opensuse pam pentest pentesting poc privilege-escalation reverse-shell security suse udisks2
Shell
None
Shell
CVE-2025-6018 (pam LPE unpriv->allow_active), CVE-2025-6019 (udisks LPE allow_active->root) in sh
Shell
Auto exploit for CVE-2025-6018 & CVE-2025-6019 based on https://github.com/0rionCollector/Exploit-Chain-CVE-2025-6018-6019
Python Shell
Script-only privilege escalation chain using CVE-2025-6019 and UDisks2 (no filesystem image included).
htb-scripts htb-writeups cve-2025-6019
Shell
A Proof of Concept for chaining CVE-2025-6018 (PAM/Polkit Active Session Bypass) and CVE-2025-6019 (libblockdev SUID Mount Flaw) to achieve Local Privilege Escalation (LPE) on vulnerable Linux systems.
Shell
Exploit Chain of CVE-2025-6018 to CVE-2025-6019
Shell
CVE-2025-6018 + CVE-2025-6019 Privilege Escalation Exploit
Shell
None
Shell
This is just a quick note on how to exploit these vulnerabilities to get root.
Mirror of https://github.com/nomi-sec/PoC-in-GitHub
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-6019 vulnerability anywhere in the article.
-
Daily CyberSecurity
Wide Open Firewall: Critical Foomuuri Flaws Let Local Users Take Control
The SUSE Security Team has released a detailed report exposing multiple vulnerabilities in Foomuuri, a popular nftables-based firewall manager for Linux, that left the firewall’s management interface ... Read more
-
Kaspersky
Update Microsoft SharePoint ASAP | Kaspersky official blog
Unknown malefactors are actively attacking companies that use SharePoint Server 2016, SharePoint Server 2019 and SharePoint Server Subscription Edition. By exploiting a chain of two vulnerabilities – ... Read more
-
Cyber Security News
PoC Released for Linux Privilege Escalation Vulnerability via udisksd and libblockdev
A proof-of-concept exploit for a critical local privilege escalation vulnerability affecting major Linux distributions, including Fedora and SUSE environments. The vulnerability, designated CVE-2025-6 ... Read more
-
Daily CyberSecurity
Linux Privilege Escalation (CVE-2025-6019): Root Access Via udisksd & libblockdev, PoC Available
Security researchers from SecureLayer7 published the technical details and a proof-of-concept exploit for a security vulnerability, CVE-2025-6019, affecting Linux distributions that rely on the udisks ... Read more
-
Kaspersky
Multiple vulnerabilities in Sitecore CMS | Kaspersky official blog
Researchers have uncovered three vulnerabilities in the popular content management system, Sitecore Experience Platform. CVE-2025-34509 involves a hard-coded password (consisting of just a single lett ... Read more
The following table lists the changes that have been made to the
CVE-2025-6019 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 10, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:10796 -
CVE Modified by [email protected]
Jun. 30, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:9878 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 23, 2025
Action Type Old Value New Value Added Reference https://news.ycombinator.com/item?id=44325861 Added Reference https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attackers-get-root-on-major-linux-distros/ -
CVE Modified by [email protected]
Jun. 23, 2025
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2025:9320 Added Reference https://access.redhat.com/errata/RHSA-2025:9321 Added Reference https://access.redhat.com/errata/RHSA-2025:9322 Added Reference https://access.redhat.com/errata/RHSA-2025:9323 Added Reference https://access.redhat.com/errata/RHSA-2025:9324 Added Reference https://access.redhat.com/errata/RHSA-2025:9325 Added Reference https://access.redhat.com/errata/RHSA-2025:9326 Added Reference https://access.redhat.com/errata/RHSA-2025:9327 Added Reference https://access.redhat.com/errata/RHSA-2025:9328 -
CVE Modified by [email protected]
Jun. 21, 2025
Action Type Old Value New Value Added Reference https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 19, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/06/17/5 Added Reference http://www.openwall.com/lists/oss-security/2025/06/17/6 Added Reference http://www.openwall.com/lists/oss-security/2025/06/18/1 Added Reference https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html -
New CVE Received by [email protected]
Jun. 19, 2025
Action Type Old Value New Value Added Description A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the "allow_active" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an "allow_active" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation. However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system. Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-250 Added Reference https://access.redhat.com/security/cve/CVE-2025-6019 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2370051