Vulnerability in Kernel: bpf: Fix crash due to incorrect copy_map_value
Summary
GSD-2022-1000813: bpf: Fix crash due to incorrect copy_map_value. Affects Kernel versions >= 68134668c17f31f51930478f75495b552a411550, < 719d1c2524c89ada78c4c9202641c1d9e942a322. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between processes, and ensures security and stability. The bpf (Berkeley Packet Filter) subsystem within the Kernel allows users to define and execute custom programs for network packet filtering, monitoring, and manipulation. This vulnerability in the bpf subsystem can lead to a crash due to an incorrect copy_map_value operation.
Vulnerability Detail
The vulnerability arises from an incorrect copy_map_value operation in the bpf subsystem. When certain conditions are met, this flaw can trigger a crash, potentially leading to a denial of service (DoS) situation. The vulnerability was introduced in version v5.15 of the Linux Kernel and was fixed in version v5.15.26. Attackers may exploit this vulnerability to disrupt system functionality or cause instability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can apply the patch manually to their existing Kernel version. The patch can be obtained from the commit 719d1c2524c89ada78c4c9202641c1d9e942a322 in the Linux Kernel repository. Users should carefully follow the instructions provided in the commit to ensure the patch is applied correctly.
Conclusion
The vulnerability in the Kernel's bpf subsystem, which caused crashes due to an incorrect copy_map_value operation, has been addressed in version v5.15.26. Users are strongly advised to update their Linux Kernel to this version or later to mitigate the risk of exploitation. Applying the provided patch manually can serve as a temporary workaround until the update is applied. For further support or assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a crash in the bpf subsystem, potentially causing a denial of service (DoS) situation. Attackers may exploit this vulnerability to disrupt system functionality or cause instability.
The vulnerability was introduced in version v5.15 of the Linux Kernel. Versions prior to v5.15 are not affected.
There is no information available regarding active exploitation of this vulnerability in the wild at the time of this report.
Applying the provided patch manually to the existing Kernel version can serve as a temporary mitigation until the Kernel can be updated.
For more details about this vulnerability, including technical specifics and the fix, refer to the source link provided in the database_specific section of this report.
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