Memory Corruption Vulnerability in Linux Kernel - CVE-2022-20421
Summary
CVE-2022-20421: In binder_inc_ref_for_node of binder.c, there is a possible way to corrupt memory due to a use after free. Affects linux versions < 5.10.149-1. Fixed in 5.10.149-1. 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 the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. It is widely used in various environments, including servers, desktops, and embedded systems. The kernel's stability and security are crucial, as vulnerabilities can lead to severe consequences, including unauthorized access and system instability. CVE-2022-20421 specifically affects the binder component of the kernel, which facilitates communication between different processes.
Vulnerability Detail
CVE-2022-20421 is a use-after-free vulnerability found in the binder_inc_ref_for_node function of binder.c within the Linux kernel. This flaw allows an attacker to exploit memory corruption, potentially leading to local privilege escalation without requiring additional execution privileges. The vulnerability arises when a reference to a memory object is used after it has been freed, which can corrupt memory and compromise system integrity. The severity of this vulnerability is underscored by its CVSS score of 7.8, indicating a high risk to affected systems.
How To Fix
Minimum fixed version
5.10.149-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds available for this vulnerability other than applying the kernel updates as mentioned above. Users are advised to monitor their systems for any unusual behavior and ensure that they are running the latest kernel versions.
Conclusion
CVE-2022-20421 represents a serious vulnerability in the Linux kernel that can lead to memory corruption and privilege escalation. It is crucial for users to update their systems to the latest kernel versions to protect against potential exploits. Regular monitoring and updates are essential for maintaining system security.
See every vulnerability recorded for linux →
FAQ
CVE-2022-20421 is a vulnerability in the Linux kernel that allows for memory corruption due to a use-after-free error, potentially leading to local privilege escalation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
Exploitation of this vulnerability could allow an attacker to escalate privileges on the affected system, potentially leading to unauthorized access and control.
The vulnerability affects various versions of the Linux kernel in Debian 11, 12, and 13, specifically before the fixed versions: 5.10.149-1 and 5.19.11-1.
No, user interaction is not needed for exploitation, making it a significant security concern.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
