CVE-2024-53109 nommu: pass NULL argument to vma_iter_prealloc()
A null pointer dereference in the Linux kernel nommu subsystem causes a crash when accessing VMA iterators, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-53109?
CVE-2024-53109 is a high-severity vulnerability in Linux kernel, published on 2 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
nommu: pass NULL argument to vma_iter_prealloc()
When deleting a vma entry from a maple tree, it has to pass NULL to vma_iter_prealloc() in order to calculate internal state of the tree, but it passed a wrong argument. As a result, nommu kernels crashed upon accessing a vma iterator, such as acct_collect() reading the size of vma entries after do_munmap().
This commit fixes this issue by passing a right argument to the preallocation call.
Which versions are affected by CVE-2024-53109?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53109?
Apply the vendor's patch.
Is CVE-2024-53109 being exploited?
There is no known exploitation of CVE-2024-53109 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54126, BELL-CVE-2024-53109, DEBIAN-CVE-2024-53109, GHSA-86gj-xr8h-wjf6, UBUNTU-CVE-2024-53109.