CVE-2024-26759: Vulnerability in linux-libc-dev package - Race condition in mm/swap
Summary
CVE-2024-26759: In the Linux kernel, the following vulnerability has been resolved: mm/swap: fix race when skipping swapcache When skipping swapcache for SWP_SYNCHRONOUS_IO, if two or more threads swapin the same entry at the same time,... 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-libc-dev package is a development package that provides the necessary header files and libraries for compiling programs that use the Linux kernel interfaces. It is an essential component for building and running applications on Linux systems. The package is widely used in various distributions, including Debian. However, a vulnerability has been discovered in the package that could lead to data corruption and loss due to a race condition in the mm/swap module.
Vulnerability Detail
The vulnerability (CVE-2024-26759) arises from a race condition in the mm/swap module of the Linux kernel. When multiple threads attempt to swap in the same entry at the same time while skipping swapcache, they may end up with different pages. This can result in an ABA problem, where one thread installs a stalled page into the page table entry (PTE) while another thread swaps out the possibly modified page, causing data corruption. Additionally, the swap_free() function in ZRAM allows the swap device to discard entry content, potentially leading to data loss even if the page is not modified. This vulnerability can be triggered by specific conditions and has the potential to cause data corruption and loss.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring they have the latest version of the linux-libc-dev package installed. Additionally, implementing proper access controls and monitoring mechanisms can help detect and prevent potential data corruption or loss.
Conclusion
The linux-libc-dev package is vulnerable to a race condition in the mm/swap module, which can lead to data corruption and loss. It is crucial to update the package to the latest version that includes the necessary patch. Additionally, implementing proper access controls and monitoring mechanisms can help mitigate the risk. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The linux-libc-dev package provides header files and libraries for compiling programs that use Linux kernel interfaces. It is an essential component for building and running applications on Linux systems.
The vulnerability can lead to data corruption and loss due to a race condition in the mm/swap module. It can potentially affect systems using the linux-libc-dev package, leading to data integrity issues.
To fix this vulnerability, it is recommended to update the linux-libc-dev package to the latest version, which includes the patch for the race condition in the mm/swap module.
There are no specific workarounds mentioned for this vulnerability. However, keeping the linux-libc-dev package up to date and implementing proper access controls and monitoring mechanisms can help mitigate the risk.
Yes, the vulnerability can potentially lead to data loss, especially when using ZRAM. The swap_free() function in ZRAM allows the swap device to discard entry content, which can result in data loss even if the page is not modified.
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