Critical Memory Leak and Crash Vulnerability in Linux Kernel - CVE-2023-52610
Summary
CVE-2023-52610: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix skb leak and crash on ooo frags act_ct adds skb->users before defragmentation. 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 is known for its stability, performance, and security features. However, vulnerabilities can arise, impacting its reliability. CVE-2023-52610 specifically affects the net/sched module, which handles network scheduling and connection tracking, making it crucial for network performance and security.
Vulnerability Detail
CVE-2023-52610 is a vulnerability in the Linux kernel's net/sched module, where a memory leak occurs due to improper handling of out-of-order fragmented packets. When fragments arrive out of order, the last fragment's reference is not released, leading to memory leaks. This situation can escalate, causing a crash during packet capture when the socket buffer (skb) is cloned and shared simultaneously. The vulnerability is rooted in the skb->users reference management before defragmentation, which, if not addressed, can lead to system instability and potential denial of service.
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 to the Linux kernel as soon as they are available.
Conclusion
CVE-2023-52610 is a critical vulnerability in the Linux kernel that can lead to memory leaks and system crashes. It is essential for users to update their systems to the latest kernel versions to mitigate this risk. Monitoring tools like Vulert can help keep your software secure by alerting you to vulnerabilities in real-time.
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FAQ
CVE-2023-52610 is a vulnerability in the Linux kernel that causes a memory leak and potential crash due to improper handling of out-of-order fragmented packets.
This vulnerability can lead to memory leaks, which may cause system instability and crashes, particularly during network packet capture operations.
If your system is affected, you should upgrade your Linux kernel to the latest version that addresses this vulnerability.
As of now, there are no publicly known exploits for CVE-2023-52610, but it is advisable to patch the vulnerability to prevent potential exploitation.
You can use tools like Vulert, which monitors open-source vulnerabilities in your software using a manifest file like package-lock.json. You can check your application for vulnerabilities without signup using the Vulert playground.
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