Race Condition Vulnerability in Linux Kernel - CVE-2022-49420
Summary
CVE-2022-49420: In the Linux kernel, the following vulnerability has been resolved: net: annotate races around sk->sk_bound_dev_if UDP sendmsg() is lockless, and reads sk->sk_bound_dev_if while this field can be changed by another threa... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interaction. It manages system resources, handles process scheduling, and facilitates communication between hardware and software components. This vulnerability specifically affects the UDP protocol implementation within the kernel, where a race condition can occur due to concurrent access to the sk_bound_dev_if field.
Vulnerability Detail
CVE-2022-49420 is a race condition vulnerability in the Linux kernel's UDP sendmsg() function. The issue arises because the sk_bound_dev_if field can be modified by one thread while another thread reads it, leading to potential data races. This vulnerability was identified by the Kernel Concurrency Sanitizer, which reported a data race in the __ip6_datagram_connect and udpv6_sendmsg functions. The consequences of this vulnerability can include unexpected behavior in network communications, although the impact is considered minor.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds provided for this vulnerability. It is advisable to apply the patch as soon as it becomes available.
Conclusion
CVE-2022-49420 is a race condition vulnerability in the Linux kernel that affects UDP communications. While the impact is considered minor, it is essential to update to the patched version of the kernel to mitigate any potential risks. Utilizing tools like Vulert can help monitor for such vulnerabilities in your applications.
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FAQ
CVE-2022-49420 is a race condition vulnerability in the Linux kernel that affects the UDP protocol, potentially leading to unexpected behavior in network communications.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
The vulnerability can lead to data races in network communications, which may cause unexpected behavior, although the overall impact is considered minor.
You can update your Linux kernel by running the command: sudo apt-get install linux=5.18.5-1 on Debian-based systems.
Currently, there are no specific workarounds available. It is recommended to apply the patch as soon as it is available.
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