Critical Security Update for libblockdev: Local Privilege Escalation Vulnerability
Summary
ALSA-2025:9327: Important: libblockdev security update. Affects libblockdev versions < 2.28-14.el9_6. Fixed in 2.28-14.el9_6. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
libblockdev is a C library that provides GObject introspection support for low-level operations on block devices. It acts as a wrapper around various plug-ins that facilitate functionalities such as LVM (Logical Volume Manager), Btrfs (B-tree file system), LUKS (Linux Unified Key Setup), and MD RAID (Multiple Device Redundant Array of Independent Disks). This library is essential for managing block devices efficiently and securely. However, a recent vulnerability has been identified that could allow unauthorized users to escalate their privileges.
Vulnerability Detail
The vulnerability, identified as CVE-2025-6019, allows for local privilege escalation (LPE) from an active user to root through the libblockdev library via udisks. This could potentially allow malicious users to gain unauthorized access to sensitive system resources, leading to severe security breaches. The flaw arises from improper handling of permissions within the library, making it critical for users to address this issue promptly.
How To Fix
Minimum fixed version
2.28-14.el9_6
This is the first release that contains the fix.
sudo dnf update libblockdevTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can restrict access to the affected library until the update is applied. This can be done by modifying permissions on the library files or by disabling the udisks service if it is not essential for your operations.
Conclusion
The libblockdev library has a critical vulnerability that allows local privilege escalation, which poses significant risks to system security. It is essential for users to update to the patched version to mitigate these risks. Temporary workarounds can be employed, but they should not replace the need for a proper update.
See every vulnerability recorded for libblockdev →
FAQ
CVE-2025-6019 is a vulnerability in the libblockdev library that allows local privilege escalation from an active user to root.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
If an immediate update is not possible, consider restricting access to the affected library or disabling related services as a temporary measure.
Failing to address this vulnerability could allow unauthorized users to escalate their privileges, potentially compromising the entire system.
More details can be found on the CVE page for CVE-2025-6019, which includes information about the impact and technical specifics.
Related vulnerabilities
Recent vulnerabilities recorded for libblockdev.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
