Kernel Memory Management Vulnerability in Linux Package: s390/boot Segment Corruption
Summary
DEBIAN-CVE-2024-45014: In the Linux kernel, the following vulnerability has been resolved: s390/boot: Avoid possible physmem_info segment corruption When physical memory for the kernel image is allocated it does not consider extra memory requi... Affects linux versions < 6.10.7-1. Fixed in 6.10.7-1. 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 hardware communication. It provides essential services for all other software running on the system. The kernel is highly modular and supports various architectures, including s390, which is designed for IBM mainframes. This vulnerability specifically affects the memory allocation process for the kernel image, potentially leading to system instability and security risks.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the s390/boot component, where physical memory allocation for the kernel image does not account for additional memory needed to align the image start with the lower 20 bits of the KASLR (Kernel Address Space Layout Randomization) virtual base address. This oversight can lead to kernel access beyond its allocated memory range, resulting in possible corruption of the physmem_info segment. The implications of this vulnerability include system crashes, data corruption, and potential exploitation by malicious actors to gain unauthorized access to system resources.
How To Fix
Minimum fixed version
6.10.7-1
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 provided for this vulnerability. The best course of action is to apply the available patch as soon as possible.
Conclusion
The vulnerability identified in the Linux kernel's s390/boot component poses significant risks due to improper memory allocation. Users are strongly advised to update their systems to the patched version 6.10.7-1 to ensure security and stability. Regular monitoring for vulnerabilities using tools like Vulert can help maintain the integrity of your software.
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FAQ
The vulnerability involves improper memory allocation in the Linux kernel's s390/boot component, which can lead to kernel access beyond its memory range.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities without requiring installation.
The consequences may include system crashes, data corruption, and unauthorized access to system resources, posing significant security risks.
Yes, a patch is available in version 6.10.7-1 of the Linux package for both Debian 13 and Debian 14.
While there are no specific workarounds, it is crucial to prioritize applying the patch as soon as possible to mitigate the risks associated with this vulnerability.
References
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