CVE-2022-49896
- Source
- https://cve.org/CVERecord?id=CVE-2022-49896
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49896.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49896
- Downstream
- Published
- 2025-05-01T14:10:38Z
- Modified
- 2026-08-12T03:51:48Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49896.json" }- References
-
- https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a
- https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49896.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49896
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git