Critical Security Flaw in libblockdev: Local Privilege Escalation Vulnerability
Summary
RLSA-2025:9878: Important: libblockdev security update. Affects libblockdev versions < 0:2.28-7.el8_10. Fixed in 0:2.28-7.el8_10. How to fix ↓
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Background
libblockdev is a C library designed for low-level operations on block devices, providing GObject introspection support. It acts as a wrapper around various plug-ins that enable specific functionalities, such as LVM, Btrfs, LUKS, and MD RAID. This library is integral for managing block devices in systems running Rocky Linux 8, making its security paramount.
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 flaw can be exploited by an attacker with local access to gain elevated privileges, potentially compromising the entire system. The CVSS score for this vulnerability is 7.0, indicating a high severity level that necessitates immediate attention.
How To Fix
Minimum fixed version
0:2.28-7.el8_10
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 of now, there are no specific workarounds documented for this vulnerability. The best course of action is to apply the security update as soon as it becomes available.
Conclusion
The libblockdev library is crucial for block device management in Rocky Linux 8. The identified vulnerability (CVE-2025-6019) poses a significant risk due to its potential for local privilege escalation. Immediate action is required to update the library to the patched version to safeguard your system.
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.
While there are no specific workarounds, it is advisable to limit access to the system until the package can be updated.
Exploitation of this vulnerability can allow an attacker to gain root access, leading to complete control over the affected system.
The libblockdev library is maintained by the Rocky Enterprise Software Foundation and Red Hat.
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