Vulnerability in Kernel: nfc_genl_dump_ses_done
Summary
GSD-2021-1002456: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done. Affects Kernel versions >= ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 48fcd08fdbe05e35b650a252ec2a2d96057a1c7a. 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 functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures proper operation of the system. The nfc (Near Field Communication) subsystem within the Kernel enables communication with NFC devices. This vulnerability, identified as GSD-2021-1002456, affects the nfc_genl_dump_ses_done function within the nfc subsystem.
Vulnerability Detail
The nfc_genl_dump_ses_done function in the nfc subsystem of the Kernel is susceptible to a potential NULL pointer dereference. This vulnerability was introduced in version v3.12 of the Kernel by commit ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95 and was fixed in version v5.4.165 by commit 48fcd08fdbe05e35b650a252ec2a2d96057a1c7a. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, it could lead to system instability, crashes, or potential privilege escalation.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability. It is advised to apply the fix by updating the Kernel to the recommended version.
Conclusion
The vulnerability in the nfc_genl_dump_ses_done function of the Kernel could potentially lead to system instability or privilege escalation if successfully exploited. It is crucial to update the Kernel to version v5.4.165 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices.
The nfc subsystem within the Kernel enables communication with NFC devices.
A NULL pointer dereference occurs when a program attempts to access or manipulate memory using a pointer that is not pointing to a valid memory location (NULL). This can lead to crashes or other unexpected behavior.
Privilege escalation refers to the act of gaining higher levels of access or privileges on a system than originally intended. It allows an attacker to perform actions that would otherwise be restricted, potentially leading to unauthorized control of the system.
The process of updating the Kernel depends on the Linux distribution being used. It typically involves using package management tools or manually compiling and installing the updated Kernel version.
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