Critical Security Flaw in Kernel Packages: CVE-2023-52922
Summary
ALSA-2025:3026: Important: kernel security update. Affects bpftool versions < 4.18.0-553.45.1.el8_10. Fixed in 4.18.0-553.45.1.el8_10. 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
The kernel packages are integral components of the Linux operating system, providing essential functionalities that allow the system to interact with hardware and manage resources. These packages include various modules and tools that enhance the performance and capabilities of the Linux kernel. The vulnerability identified as CVE-2023-52922 affects the kernel's handling of certain operations, potentially leading to security breaches.
Vulnerability Detail
CVE-2023-52922 is a use-after-free (UAF) vulnerability found in the bcm_proc_show() function of the kernel's CAN (Controller Area Network) subsystem. This flaw can be exploited by an attacker to execute arbitrary code or cause a denial of service, compromising the integrity and availability of the system. The vulnerability arises from improper memory management, which allows an attacker to manipulate memory allocations and gain unauthorized access to sensitive data.
How To Fix
Minimum fixed version
4.18.0-553.45.1.el8_10
This is the first release that contains the fix.
sudo dnf update bpftoolTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users may consider disabling the CAN subsystem if it is not required for their applications. This can be done by modifying the kernel boot parameters to exclude the CAN module, although this is not a permanent solution and does not address the underlying vulnerability.
Conclusion
The CVE-2023-52922 vulnerability presents a critical security risk to Linux kernel users. It is imperative to update affected packages to the latest versions to safeguard against potential exploits. Utilizing tools like Vulert can help monitor vulnerabilities effectively.
See every vulnerability recorded for bpftool →
FAQ
CVE-2023-52922 is a security vulnerability in the Linux kernel that allows attackers to exploit a use-after-free condition, potentially leading to arbitrary code execution.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
Exploitation of this vulnerability can lead to unauthorized access, data breaches, and system instability, posing significant risks to system integrity and security.
Yes, a patch is available in the updated kernel packages. Users should update to version 4.18.0-553.45.1.el8_10 or later to mitigate the risk.
If immediate updates are not possible, consider disabling the CAN subsystem as a temporary workaround until the system can be patched.
Related vulnerabilities
Recent vulnerabilities recorded for bpftool.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
