# CVE-2025-6019

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.

- Page: https://www.vulneraibility.com/cve/CVE-2025-6019
- CVSS: 7.0
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.48% (percentile 42.0)
- Unvetted proof-of-concept code on GitHub: 11 GitHub proofs of concept (first 2025-06-19)
- CISA SSVC: exploitation none, automatable no, technical impact total (assessed 2025-06-24)
- Weakness: CWE-250
- Published: 2025-06-19

## References

- [advisory] https://access.redhat.com/errata/RHSA-2025:10796
- [advisory] https://access.redhat.com/errata/RHSA-2025:9320
- [advisory] https://access.redhat.com/errata/RHSA-2025:9321
- [advisory] https://access.redhat.com/errata/RHSA-2025:9322
- [advisory] https://access.redhat.com/errata/RHSA-2025:9323
- [advisory] https://access.redhat.com/errata/RHSA-2025:9324
- [advisory] https://access.redhat.com/errata/RHSA-2025:9325
- [advisory] https://access.redhat.com/errata/RHSA-2025:9326
- [advisory] https://access.redhat.com/errata/RHSA-2025:9327
- [advisory] https://access.redhat.com/errata/RHSA-2025:9328
- [advisory] https://access.redhat.com/errata/RHSA-2025:9878
- [other] https://access.redhat.com/security/cve/CVE-2025-6019
- [other] https://bugzilla.redhat.com/show_bug.cgi?id=2370051
- [other] https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- [other] http://www.openwall.com/lists/oss-security/2025/06/17/5
- [other] http://www.openwall.com/lists/oss-security/2025/06/17/6
- [other] https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- [other] http://www.openwall.com/lists/oss-security/2025/06/18/1
- [other] https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attackers-get-root-on-major-linux-distros/
- [other] https://news.ycombinator.com/item?id=44325861

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.