Critical Memory Access Vulnerability in Linux Kernel (CVE-2024-57925)
Summary
CVE-2024-57925: In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix a missing return value check bug In the smb2_send_interim_resp(), if ksmbd_alloc_work_struct() fails to allocate a node, it returns a NULL po... Affects linux versions < 6.1.128-1. Fixed in 6.1.128-1. 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, like any complex software, it can have vulnerabilities. CVE-2024-57925 specifically affects the ksmbd module, which is responsible for SMB (Server Message Block) protocol support, enabling file sharing and network communication. This vulnerability arises from a missing return value check in the code, which can lead to illegal memory access.
Vulnerability Detail
CVE-2024-57925 is a vulnerability in the Linux kernel's ksmbd module, where the function smb2_send_interim_resp() does not properly check the return value of ksmbd_alloc_work_struct(). If this function fails to allocate memory, it returns a NULL pointer, leading to an illegal memory write when allocate_interim_rsp_buf() tries to access in_work->response_buf. This can result in undefined behavior, potential data corruption, or system crashes, making it a significant security risk.
How To Fix
Minimum fixed version
6.1.128-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the patch by updating the kernel as described in the 'how_to_fix' section.
Conclusion
CVE-2024-57925 is a critical vulnerability in the Linux kernel's ksmbd module that can lead to illegal memory access. Users are strongly advised to update their systems to the latest patched version to mitigate potential risks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system security.
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FAQ
CVE-2024-57925 is a vulnerability in the Linux kernel's ksmbd module that can lead to illegal memory access due to a missing return value check.
The vulnerability can cause undefined behavior, data corruption, or system crashes, posing a significant security risk.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Check your application against CVE-2024-57925 using the Vulert playground at Vulert Scanner.
Yes, a patch is available. Users should update their Linux kernel to the latest version to mitigate this vulnerability.
While there are no specific workarounds, it is crucial to prioritize updating your kernel to protect against this vulnerability as soon as possible.
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