Null Pointer Dereference Vulnerability in Linux Kernel - CVE-2022-50455
Summary
DEBIAN-CVE-2022-50455: In the Linux kernel, the following vulnerability has been resolved: nfs: fix possible null-ptr-deref when parsing param According to commit "vfs: parse: deal with zero length string value", kernel will set the param->str... Affects linux versions 5.10.103-1 – 6.9.9-1. 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, responsible for managing hardware and system resources. It provides essential services for all other parts of the operating system, including process management, memory management, and device control. The kernel is highly modular, allowing for various functionalities to be added or removed as needed. However, like any complex software, it is susceptible to vulnerabilities that can compromise system stability and security. This specific vulnerability, CVE-2022-50455, affects the NFS (Network File System) component of the Linux kernel, which is used for file sharing over a network.
Vulnerability Detail
CVE-2022-50455 is a null pointer dereference vulnerability that arises when the Linux kernel's NFS component attempts to parse parameters without verifying if the string pointer is null. This issue originates from a flaw in the vfs_parse_fs_string() function, which can set the parameter's string to null if the input string is empty. Consequently, when nfs_fs_context_parse_param() dereferences this null pointer, it can lead to a system crash or unexpected behavior, posing a risk to system stability and security.
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 provided for this vulnerability. It is recommended to apply the patch as soon as it is available to mitigate the risk.
Conclusion
CVE-2022-50455 is a critical vulnerability in the Linux kernel that requires immediate attention. Updating to the patched version is essential to ensure system stability and security. Regular monitoring and timely updates are key practices in maintaining a secure environment.
See every vulnerability recorded for linux →
FAQ
CVE-2022-50455 is a null pointer dereference vulnerability in the Linux kernel's NFS component that can lead to system crashes.
If exploited, this vulnerability can cause instability in the system, potentially leading to crashes or unexpected behavior.
Versions of the Linux kernel prior to 6.1.4-1 in Debian 12, 13, and 14 are affected. It is advisable to check your kernel version.
You can use Vulert's 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 crucial to monitor your system for any unusual behavior and plan to apply the patch as soon as possible.
References
Related vulnerabilities
Recent vulnerabilities recorded for linux.
