CVE-2023-53722 md: raid1: fix potential OOB in raid1_remove_disk()
An out-of-bounds memory access in the Linux kernel RAID1 driver allows local attackers to cause a denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53722?
CVE-2023-53722 is a memory corruption vulnerability in Linux, published on 22 Oct 2025. 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:
md: raid1: fix potential OOB in raid1_remove_disk()
If rddev->raid_disk is greater than mddev->raid_disks, there will be an out-of-bounds in raid1_remove_disk(). We have already found similar reports as follows:
1) commit d17f744e883b ("md-raid10: fix KASAN warning") 2) commit 1ebc2cec0b7d ("dm raid: fix KASAN warning in raid5_remove_disk")
Fix this bug by checking whether the "number" variable is valid.
Which versions are affected by CVE-2023-53722?
How do I fix CVE-2023-53722?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-53722 being exploited?
There is no known exploitation of CVE-2023-53722 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53722, DEBIAN-CVE-2023-53722, GHSA-564p-3xmp-v9fw, UBUNTU-CVE-2023-53722.