# CVE-2022-49896: linux: In the Linux kernel, the following vulnerability has been resolved:  cxl/pmem: Fix cxl_pmem_region and cxl_memdev lea...

CVE-2022-49896 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49896, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49896
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak  When a cxl_nvdimm object goes through a ->remove() event (device physically removed, nvdimm-bridge disabled, or nvdimm device disabled), then any associated regions must also be disabled. As highlighted by the cxl-create-region.sh test [1], a single device may host multiple regions, but the driver was only tracking one region at a time. This leads to a situation where only the last enabled region per nvdimm device is cleaned up properly. Other regions are leaked, and this also causes cxl_memdev reference leaks.  Fix the tracking by allowing cxl_nvdimm objects to track multiple region associations.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.8-1 | [DEBIAN-CVE-2022-49896](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49896.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.8-1 | [DEBIAN-CVE-2022-49896](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49896.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.8-1 | [DEBIAN-CVE-2022-49896](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49896.md) | May 1, 2025 |

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