Memory Leak Vulnerability in Linux Kernel's nft_set_catchall_flush Function
Summary
CVE-2023-4569: A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux Kernel. 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 a core component of many operating systems, providing essential services for hardware and software interaction. It is known for its stability, performance, and security features. However, vulnerabilities can arise, such as the one found in the nft_set_catchall_flush function, which is part of the netfilter framework used for packet filtering and network address translation. This specific vulnerability can lead to memory leaks, impacting system performance and reliability.
Vulnerability Detail
A memory leak flaw was discovered in the nft_set_catchall_flush function located in net/netfilter/nf_tables_api.c of the Linux Kernel. This issue allows a local attacker to cause double-deactivations of catchall elements, potentially leading to a memory leak. The vulnerability is particularly concerning as it can degrade system performance and may be exploited by malicious users to exhaust system resources.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the necessary updates as soon as they are available.
Conclusion
The CVE-2023-4569 vulnerability presents a significant risk due to its potential to cause memory leaks in the Linux Kernel. Users are advised to promptly update their systems to the fixed versions to mitigate this risk. Regular monitoring and updates are essential for maintaining system security.
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FAQ
CVE-2023-4569 is a memory leak vulnerability found in the nft_set_catchall_flush function of the Linux Kernel, which can be exploited by local attackers.
This vulnerability can lead to memory leaks, which may degrade system performance and reliability, potentially allowing attackers to exhaust system resources.
The vulnerability affects multiple versions of the Linux Kernel across Debian 11, 12, and 13, with specific fixed versions available.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. By checking your manifest file like package-lock.json, you can determine if your application is affected.
The CVSS score for this vulnerability is 5.5, indicating a moderate level of severity.
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