CVE-2022-50402 drivers/md/md-bitmap: check the return value of md_bitmap_get_counter()

What is CVE-2022-50402?

CVE-2022-50402 is a medium-severity vulnerability in Linux kernel, published on 18 Sep 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:

drivers/md/md-bitmap: check the return value of md_bitmap_get_counter()

Check the return value of md_bitmap_get_counter() in case it returns NULL pointer, which will result in a null pointer dereference.

v2: update the check to include other dereference

Weakness: CWE-476

Which versions are affected by CVE-2022-50402?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-50402?

Apply the vendor's patch.

Is CVE-2022-50402 being exploited?

There is no known exploitation of CVE-2022-50402 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-50402, GHSA-64qw-h683-jg2m, UBUNTU-CVE-2022-50402.