7.0 HIGH
- CVSS version: 3.1
- Attack vector (AV): LOCAL
- Attack complexity (AC): HIGH
- Privileges required (PR): LOW
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): HIGH
- Integrity impact (I): HIGH
- Availability impact (A): HIGH
Libblockdev: lpe from allow_active to root in libblockdev via udisks
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.
References
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9878 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9878 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- RHSA-2025:10796 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9878 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- RHSA-2025:10796 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9878 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- RHSA-2025:10796 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
- RHSA-2025:9326 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9327 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9328 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9878 vendor-advisory x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-6019 x_refsource_REDHAT vdb-entry
- RHBZ#2370051 issue-tracking x_refsource_REDHAT
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- RHSA-2025:10796 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9320 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9321 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9322 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9323 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9324 vendor-advisory x_refsource_REDHAT
- RHSA-2025:9325 vendor-advisory x_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attacker…
- https://news.ycombinator.com/item?id=44325861
Affected products
- <3.3.1
- *
Matching in nixpkgs
pkgs.libblockdev
Library for manipulating block devices
-
nixos-unstable -
- nixpkgs-unstable 3.3.0
Package maintainers
-
@JohnAZoidberg Daniel Schäfer <git@danielschaefer.me>