CVE-2022-49833 btrfs: zoned: clone zoned device info when cloning a device

What is CVE-2022-49833?

CVE-2022-49833 is a medium-severity vulnerability in Linux kernel, published on 1 May 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:

btrfs: zoned: clone zoned device info when cloning a device

When cloning a btrfs_device, we're not cloning the associated btrfs_zoned_device_info structure of the device in case of a zoned filesystem.

Later on this leads to a NULL pointer dereference when accessing the device's zone_info for instance when setting a zone as active.

This was uncovered by fstests' testcase btrfs/161.

Weakness: CWE-476

Which versions are affected by CVE-2022-49833?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49833?

Apply the vendor's patch.

Is CVE-2022-49833 being exploited?

There is no known exploitation of CVE-2022-49833 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 AZL-69917, DEBIAN-CVE-2022-49833, GHSA-qq9j-c8r5-5xf6, ROOT-OS-UBUNTU-2204-CVE-2022-49833, UBUNTU-CVE-2022-49833.