Critical Vulnerability in Linux Kernel: Debug Objects Issue
Summary
DEBIAN-CVE-2026-53327: In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which asserts if current::pi_blocked... Affects linux versions 6.1.106-1 – 7.1~rc7-1~exp1. No fix is published. 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
Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interactions. It is known for its robustness and flexibility, supporting a wide range of devices and architectures. However, like any complex software, it is susceptible to vulnerabilities that can compromise system integrity and security. This specific vulnerability affects the debugobjects feature, which is crucial for managing locking mechanisms in real-time (RT) enabled kernels.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the debugobjects functionality. The issue arises when the fill_pool() function is called while a task is blocked on a priority inheritance (PI) lock. This can lead to assertions failing, as a task should only block on one lock to maintain the integrity of the priority inheritance chain. If exploited, this vulnerability could lead to system instability or denial of service, particularly in environments relying on real-time processing.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is recommended to apply the patch as soon as it is available to mitigate any risks associated with this issue.
Conclusion
The identified vulnerability in the Linux kernel's debugobjects feature poses significant risks to system stability and security, particularly in real-time environments. It is crucial for users to apply the available patches promptly and utilize tools like Vulert to monitor their systems for vulnerabilities.
See every vulnerability recorded for linux →
FAQ
The vulnerability is related to the debugobjects feature in the Linux kernel, specifically how it handles priority inheritance locks in real-time kernels.
The vulnerability affects Debian 12 (Bookworm), Debian 13 (Trixie), and Debian 14 (Forky) versions of the Linux kernel.
Exploitation of this vulnerability could lead to system instability, potential denial of service, and corruption of the priority inheritance chain.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected without needing to sign up.
Yes, a patch is available for Debian 14 (Forky) in version 7.0.13-1. Users are encouraged to update their systems to this version.
References
Related vulnerabilities
Recent vulnerabilities recorded for linux.
