jfs: NULL dereference in diFree
Summary
GSD-2022-1002186: jfs: prevent NULL deref in diFree. Affects Kernel versions < e19c3149a80e4fc8df298d6546640e01601f3758. No fix is published. How to fix ↓
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Background
The jfs package is a component of the Linux Kernel, which is responsible for managing the JFS file system. JFS is a journaling file system that provides high performance and reliability. It is commonly used in Linux distributions. The diFree function in the jfs package is responsible for freeing disk inode structures. However, a vulnerability exists in this function that can lead to a NULL dereference.
Vulnerability Detail
The vulnerability in the jfs package allows an attacker to trigger a NULL dereference in the diFree function. This can be exploited by an attacker to cause a denial of service (DoS) condition, leading to a system crash or hang. The vulnerability originates from a lack of proper validation of input data, allowing an attacker to pass a NULL pointer to the diFree function. This vulnerability has been assigned the ID GSD-2022-1002186.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is necessary to update the Linux Kernel to the fixed version.
Conclusion
The jfs package in the Linux Kernel is vulnerable to a NULL dereference in the diFree function. This vulnerability can be exploited to cause a denial of service condition. To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v5.4.189 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can be exploited by an attacker to cause a denial of service (DoS) condition, leading to a system crash or hang.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
Yes, a patch is available in the Linux Kernel version v5.4.189. It is recommended to update your kernel to this version or later.
No, this vulnerability requires local access to the system in order to exploit it.
There are no known instances of this vulnerability being exploited in the wild at this time.
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