CVE-2022-50835 jbd2: add miss release buffer head in fc_do_one_pass()

Not scored Published 30 Dec 2025 Updated 11 May 2026

A reference count leak in the Linux kernel jbd2 filesystem code can lead to memory exhaustion and denial of service.

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-2022-50835?

CVE-2022-50835 is a memory corruption vulnerability in Linux, published on 30 Dec 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:

jbd2: add miss release buffer head in fc_do_one_pass()

In fc_do_one_pass() miss release buffer head after use which will lead to reference count leak.

Which versions are affected by CVE-2022-50835?

How do I fix CVE-2022-50835?

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-2022-50835 being exploited?

There is no known exploitation of CVE-2022-50835 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-50835, GHSA-q896-33p3-px23, UBUNTU-CVE-2022-50835.