Vulnerability in Kernel: nfc_genl_dump_ses_done
Summary
GSD-2021-1002506: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done. Affects Kernel versions >= ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 83ea620a1be840bf05089a5061fb8323ca42f38c. 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 interfaces with hardware devices. It acts as a bridge between the hardware and software layers, facilitating communication and resource management. The nfc (Near Field Communication) subsystem within the Kernel enables devices to interact with NFC-enabled tags and other devices. It allows for secure data exchange and supports various NFC protocols.
However, a vulnerability has been identified in the nfc_genl_dump_ses_done function, which could lead to a NULL pointer dereference. This vulnerability was introduced in version v3.12 of the Linux Kernel and has been fixed in version v5.10.85. The impact and attack plausibility of this vulnerability have not been proven yet.
Vulnerability Detail
The vulnerability in the nfc_genl_dump_ses_done function arises from a potential NULL pointer dereference. When certain conditions are met, a NULL pointer can be accessed, leading to a system crash or potential exploitation by an attacker. The exact impact and attack vectors are yet to be determined.
This vulnerability was introduced in version v3.12 of the Linux Kernel and has been addressed in version v5.10.85 by commit 83ea620a1be840bf05089a5061fb8323ca42f38c.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is advised to update the Kernel to the recommended version to address the vulnerability.
Conclusion
The vulnerability in the nfc_genl_dump_ses_done function of the Linux Kernel could lead to a NULL pointer dereference, potentially resulting in a system crash or exploitation by an attacker. It is crucial to update the Kernel to version v5.10.85 or later to mitigate this vulnerability. Regularly updating the Kernel ensures that the system remains secure and protected against potential threats.
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FAQ
The impact of this vulnerability is yet to be determined. It could potentially lead to a system crash or be exploited by an attacker.
You can check the version of your Linux Kernel and compare it with the affected versions mentioned in the vulnerability details. If your Kernel version is within the affected range, it is recommended to update to the fixed version.
At the time of this report, no known exploits for this vulnerability have been identified. However, it is crucial to update the Kernel to the fixed version to prevent any potential exploitation.
No, the recommended approach to mitigate this vulnerability is to update the Linux Kernel to the fixed version. This ensures that the necessary patch is applied and the system is protected against potential exploitation.
You can refer to the provided references link for more details about this vulnerability and the specific commits that address it in the Linux Kernel.
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