What is the severity of CVE-2024-50199?

CVE-2024-50199 is classified as a moderate severity vulnerability affecting the Linux kernel.

How do I fix CVE-2024-50199?

To resolve CVE-2024-50199, ensure your system is updated to the latest version of the Linux kernel where the issue has been addressed.

What impact does CVE-2024-50199 have on systems?

CVE-2024-50199 can lead to data loss or corruption when using HugeTLB pages and calling the swapoff command.

Which versions of the Linux kernel are affected by CVE-2024-50199?

CVE-2024-50199 affects versions of the Linux kernel that do not include the fix implemented after the vulnerability was discovered.

Are there any workarounds for CVE-2024-50199?

Currently, the recommended approach for CVE-2024-50199 is to update to the patched version of the Linux kernel, as no specific workarounds have been provided.

Vulnerability/
CVE-2024-50199

8/11/2024

19/12/2024

CVE-2024-50199: mm/swapfile: skip HugeTLB pages for unuse_vma

First published: Fri Nov 08 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: skip HugeTLB pages for unuse_vma I got a bad pud error and lost a 1GB HugeTLB when calling swapoff. The problem can be reproduced by the following steps: 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory. 2. Swapout the above anonymous memory. 3. run swapoff and we will get a bad pud error in kernel message: mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7) We can tell that pud_clear_bad is called by pud_none_or_clear_bad in unuse_pud_range() by ftrace. And therefore the HugeTLB pages will never be freed because we lost it from page table. We can skip HugeTLB pages for unuse_vma to fix it.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel

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Frequently Asked Questions

What is the severity of CVE-2024-50199?
CVE-2024-50199 is classified as a moderate severity vulnerability affecting the Linux kernel.
How do I fix CVE-2024-50199?
To resolve CVE-2024-50199, ensure your system is updated to the latest version of the Linux kernel where the issue has been addressed.
What impact does CVE-2024-50199 have on systems?
CVE-2024-50199 can lead to data loss or corruption when using HugeTLB pages and calling the swapoff command.
Which versions of the Linux kernel are affected by CVE-2024-50199?
CVE-2024-50199 affects versions of the Linux kernel that do not include the fix implemented after the vulnerability was discovered.
Are there any workarounds for CVE-2024-50199?
Currently, the recommended approach for CVE-2024-50199 is to update to the patched version of the Linux kernel, as no specific workarounds have been provided.

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Frequently Asked Questions

What is the severity of CVE-2024-50199?
CVE-2024-50199 is classified as a moderate severity vulnerability affecting the Linux kernel.
How do I fix CVE-2024-50199?
To resolve CVE-2024-50199, ensure your system is updated to the latest version of the Linux kernel where the issue has been addressed.
What impact does CVE-2024-50199 have on systems?
CVE-2024-50199 can lead to data loss or corruption when using HugeTLB pages and calling the swapoff command.
Which versions of the Linux kernel are affected by CVE-2024-50199?
CVE-2024-50199 affects versions of the Linux kernel that do not include the fix implemented after the vulnerability was discovered.
Are there any workarounds for CVE-2024-50199?
Currently, the recommended approach for CVE-2024-50199 is to update to the patched version of the Linux kernel, as no specific workarounds have been provided.