Vulnerability in Linux Kernel: tcp_rtx_synack() can be called from process context
Summary
GSD-2022-1003272: tcp: tcp_rtx_synack() can be called from process context. Affects Kernel versions >= 168a8f58059a22feb9e9a2dcc1b8053dbbbc12ef, < 88cd232146207ff1d41dededed5e77c0d4438113. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. It is a critical piece of software that enables the functioning of various devices and services. The tcp_rtx_synack() function within the TCP (Transmission Control Protocol) implementation of the Linux Kernel is susceptible to being called from process context, which can lead to potential security vulnerabilities.
Vulnerability Detail
The vulnerability arises from the fact that the tcp_rtx_synack() function can be invoked from process context. This means that an attacker with sufficient privileges could potentially exploit this vulnerability to execute arbitrary code or perform other malicious activities. The impact and attack plausibility of this vulnerability have not been proven yet, but it is crucial to address it to ensure the security of the Linux Kernel.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, it is advisable to apply the official patch provided by the Linux Kernel maintainers. The patch can be obtained from the official Git repository of the Linux Kernel: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/. By applying the patch, the vulnerability can be mitigated until a Kernel update is performed.
Conclusion
The vulnerability in the Linux Kernel's tcp_rtx_synack() function being callable from process context poses a potential security risk. It is recommended to update the Kernel to version v5.15.47 or later to address this vulnerability. Applying the official patch provided by the Linux Kernel maintainers can serve as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware.
tcp_rtx_synack() is a function within the TCP implementation of the Linux Kernel. It is responsible for handling retransmission of SYN-ACK packets in TCP connections.
Process context refers to the execution context of a process within the operating system. It includes the code, data, and resources associated with a specific process.
If exploited, this vulnerability could allow an attacker to execute arbitrary code or perform other malicious activities within the Linux Kernel, potentially compromising the security and stability of the system.
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