github - ghsa-3g7w-h796-wcg5

ghsa-3g7w-h796-wcg5

Vulnerability from github

Published

2025-05-01 15:31

Modified

2025-05-07 15:31

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49896"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/pmem: Fix cxl_pmem_region and cxl_memdev leak\n\nWhen a cxl_nvdimm object goes through a -\u003eremove() event (device\nphysically removed, nvdimm-bridge disabled, or nvdimm device disabled),\nthen any associated regions must also be disabled. As highlighted by the\ncxl-create-region.sh test [1], a single device may host multiple\nregions, but the driver was only tracking one region at a time. This\nleads to a situation where only the last enabled region per nvdimm\ndevice is cleaned up properly. Other regions are leaked, and this also\ncauses cxl_memdev reference leaks.\n\nFix the tracking by allowing cxl_nvdimm objects to track multiple region\nassociations.",
  "id": "GHSA-3g7w-h796-wcg5",
  "modified": "2025-05-07T15:31:26Z",
  "published": "2025-05-01T15:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49896"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2022-49896

Vulnerability from cvelistv5

Published

2025-05-01 14:10

Modified

2025-05-04 08:48

Severity ?

Summary

cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak

References

▼	URL	Tags
	https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6
	https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

To clipboard

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/pmem.c",
            "drivers/cxl/cxl.h",
            "drivers/cxl/pmem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f43b6bfdbab78606735ba81185cf0602b81e40b6",
              "status": "affected",
              "version": "04ad63f086d1a9649b8b082748cbc7a570ade461",
              "versionType": "git"
            },
            {
              "lessThan": "4d07ae22e79ebc2d7528bbc69daa53b86981cb3a",
              "status": "affected",
              "version": "04ad63f086d1a9649b8b082748cbc7a570ade461",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/pmem.c",
            "drivers/cxl/cxl.h",
            "drivers/cxl/pmem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
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              "version": "6.0.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.8",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/pmem: Fix cxl_pmem_region and cxl_memdev leak\n\nWhen a cxl_nvdimm object goes through a -\u003eremove() event (device\nphysically removed, nvdimm-bridge disabled, or nvdimm device disabled),\nthen any associated regions must also be disabled. As highlighted by the\ncxl-create-region.sh test [1], a single device may host multiple\nregions, but the driver was only tracking one region at a time. This\nleads to a situation where only the last enabled region per nvdimm\ndevice is cleaned up properly. Other regions are leaked, and this also\ncauses cxl_memdev reference leaks.\n\nFix the tracking by allowing cxl_nvdimm objects to track multiple region\nassociations."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:48:00.724Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a"
        }
      ],
      "title": "cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49896",
    "datePublished": "2025-05-01T14:10:38.336Z",
    "dateReserved": "2025-05-01T14:05:17.244Z",
    "dateUpdated": "2025-05-04T08:48:00.724Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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