CVE-2022-49893 cxl/region: Fix cxl_region leak, cleanup targets at region delete

What is CVE-2022-49893?

CVE-2022-49893 is a medium-severity memory corruption 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:

cxl/region: Fix cxl_region leak, cleanup targets at region delete

When a region is deleted any targets that have been previously assigned to that region hold references to it. Trigger those references to drop by detaching all targets at unregister_region() time.

Otherwise that region object will leak as userspace has lost the ability to detach targets once region sysfs is torn down.

Weakness: CWE-401

Which versions are affected by CVE-2022-49893?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49893?

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-2022-49893 being exploited?

There is no known exploitation of CVE-2022-49893 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-2022-49893, GHSA-c2p4-prc5-v3mc, UBUNTU-CVE-2022-49893.