Vulnerability-Lookup

GHSA-Q8CF-83HQ-3865

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-13 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

vdpa_sim_blk: set number of address spaces and virtqueue groups

Commit bda324fd037a ("vdpasim: control virtqueue support") added two new fields (nas, ngroups) to vdpasim_dev_attr, but we forgot to initialize them for vdpa_sim_blk.

When creating a new vdpa_sim_blk device this causes the kernel to panic in this way: $ vdpa dev add mgmtdev vdpasim_blk name blk0 BUG: kernel NULL pointer dereference, address: 0000000000000030 ... RIP: 0010:vhost_iotlb_add_range_ctx+0x41/0x220 [vhost_iotlb] ... Call Trace: vhost_iotlb_add_range+0x11/0x800 [vhost_iotlb] vdpasim_map_range+0x91/0xd0 [vdpa_sim] vdpasim_alloc_coherent+0x56/0x90 [vdpa_sim] ...

This happens because vdpasim->iommu[0] is not initialized when dev_attr.nas is 0.

Let's fix this issue by initializing both (nas, ngroups) to 1 for vdpa_sim_blk.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50058"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:34Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim_blk: set number of address spaces and virtqueue groups\n\nCommit bda324fd037a (\"vdpasim: control virtqueue support\") added two\nnew fields (nas, ngroups) to vdpasim_dev_attr, but we forgot to\ninitialize them for vdpa_sim_blk.\n\nWhen creating a new vdpa_sim_blk device this causes the kernel\nto panic in this way:\n \u00a0 \u00a0$ vdpa dev add mgmtdev vdpasim_blk name blk0\n \u00a0 \u00a0BUG: kernel NULL pointer dereference, address: 0000000000000030\n \u00a0 \u00a0...\n \u00a0 \u00a0RIP: 0010:vhost_iotlb_add_range_ctx+0x41/0x220 [vhost_iotlb]\n \u00a0 \u00a0...\n \u00a0 \u00a0Call Trace:\n \u00a0 \u00a0 \u003cTASK\u003e\n \u00a0 \u00a0 vhost_iotlb_add_range+0x11/0x800 [vhost_iotlb]\n \u00a0 \u00a0 vdpasim_map_range+0x91/0xd0 [vdpa_sim]\n \u00a0 \u00a0 vdpasim_alloc_coherent+0x56/0x90 [vdpa_sim]\n \u00a0 \u00a0 ...\n\nThis happens because vdpasim-\u003eiommu[0] is not initialized when\ndev_attr.nas is 0.\n\nLet\u0027s fix this issue by initializing both (nas, ngroups) to 1 for\nvdpa_sim_blk.",
  "id": "GHSA-q8cf-83hq-3865",
  "modified": "2025-11-13T18:31:00Z",
  "published": "2025-06-18T12:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50058"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19cd4a5471b8eaa4bd161b0fdb4567f2fc88d809"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a291c7d289fac2cb13fb2614a9a251afbbd86ce9"
    }
  ],
  "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-2022-50058 (GCVE-0-2022-50058)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-05-11 19:12

Title

vdpa_sim_blk: set number of address spaces and virtqueue groups

Summary

In the Linux kernel, the following vulnerability has been resolved: vdpa_sim_blk: set number of address spaces and virtqueue groups Commit bda324fd037a ("vdpasim: control virtqueue support") added two new fields (nas, ngroups) to vdpasim_dev_attr, but we forgot to initialize them for vdpa_sim_blk. When creating a new vdpa_sim_blk device this causes the kernel to panic in this way: $ vdpa dev add mgmtdev vdpasim_blk name blk0 BUG: kernel NULL pointer dereference, address: 0000000000000030 ... RIP: 0010:vhost_iotlb_add_range_ctx+0x41/0x220 [vhost_iotlb] ... Call Trace: <TASK> vhost_iotlb_add_range+0x11/0x800 [vhost_iotlb] vdpasim_map_range+0x91/0xd0 [vdpa_sim] vdpasim_alloc_coherent+0x56/0x90 [vdpa_sim] ... This happens because vdpasim->iommu[0] is not initialized when dev_attr.nas is 0. Let's fix this issue by initializing both (nas, ngroups) to 1 for vdpa_sim_blk.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/a291c7d289fac2cb1…
https://git.kernel.org/stable/c/19cd4a5471b8eaa4b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: bda324fd037a6b0d44da5699574ce741ca161bc4 , < a291c7d289fac2cb13fb2614a9a251afbbd86ce9 (git) Affected: bda324fd037a6b0d44da5699574ce741ca161bc4 , < 19cd4a5471b8eaa4bd161b0fdb4567f2fc88d809 (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 5.19.4 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim_blk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a291c7d289fac2cb13fb2614a9a251afbbd86ce9",
              "status": "affected",
              "version": "bda324fd037a6b0d44da5699574ce741ca161bc4",
              "versionType": "git"
            },
            {
              "lessThan": "19cd4a5471b8eaa4bd161b0fdb4567f2fc88d809",
              "status": "affected",
              "version": "bda324fd037a6b0d44da5699574ce741ca161bc4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim_blk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.4",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim_blk: set number of address spaces and virtqueue groups\n\nCommit bda324fd037a (\"vdpasim: control virtqueue support\") added two\nnew fields (nas, ngroups) to vdpasim_dev_attr, but we forgot to\ninitialize them for vdpa_sim_blk.\n\nWhen creating a new vdpa_sim_blk device this causes the kernel\nto panic in this way:\n \u00a0 \u00a0$ vdpa dev add mgmtdev vdpasim_blk name blk0\n \u00a0 \u00a0BUG: kernel NULL pointer dereference, address: 0000000000000030\n \u00a0 \u00a0...\n \u00a0 \u00a0RIP: 0010:vhost_iotlb_add_range_ctx+0x41/0x220 [vhost_iotlb]\n \u00a0 \u00a0...\n \u00a0 \u00a0Call Trace:\n \u00a0 \u00a0 \u003cTASK\u003e\n \u00a0 \u00a0 vhost_iotlb_add_range+0x11/0x800 [vhost_iotlb]\n \u00a0 \u00a0 vdpasim_map_range+0x91/0xd0 [vdpa_sim]\n \u00a0 \u00a0 vdpasim_alloc_coherent+0x56/0x90 [vdpa_sim]\n \u00a0 \u00a0 ...\n\nThis happens because vdpasim-\u003eiommu[0] is not initialized when\ndev_attr.nas is 0.\n\nLet\u0027s fix this issue by initializing both (nas, ngroups) to 1 for\nvdpa_sim_blk."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:12:02.846Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a291c7d289fac2cb13fb2614a9a251afbbd86ce9"
        },
        {
          "url": "https://git.kernel.org/stable/c/19cd4a5471b8eaa4bd161b0fdb4567f2fc88d809"
        }
      ],
      "title": "vdpa_sim_blk: set number of address spaces and virtqueue groups",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50058",
    "datePublished": "2025-06-18T11:02:06.988Z",
    "dateReserved": "2025-06-18T10:57:27.404Z",
    "dateUpdated": "2026-05-11T19:12:02.846Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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