CVE-2023-53722

About vulnerability

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.

Affected product:

AlmaLinux 9.2 ESU , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , TuxCare 9.6 ESU

Affected packages:

kernel @ 4.18.0 (+4 more)

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.