Vulnerability-Lookup

GHSA-XPCF-MWVF-62V9

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

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

vhost: move vdpa group bound check to vhost_vdpa

Remove duplication by consolidating these here. This reduces the posibility of a parent driver missing them.

While we're at it, fix a bug in vdpa_sim where a valid ASID can be assigned to a group equal to ngroups, causing an out of bound write.

Severity ?

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43248"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:45Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: move vdpa group bound check to vhost_vdpa\n\nRemove duplication by consolidating these here.  This reduces the\nposibility of a parent driver missing them.\n\nWhile we\u0027re at it, fix a bug in vdpa_sim where a valid ASID can be\nassigned to a group equal to ngroups, causing an out of bound write.",
  "id": "GHSA-xpcf-mwvf-62v9",
  "modified": "2026-05-08T15:31:18Z",
  "published": "2026-05-06T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43248"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/406db68f9cb976a8ddfafd631197264f2307e9c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7441d35d14d9a3d66d925d90cb73c75394e6d454"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd025c1e876b4e262e71398236a1550486a73ede"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ddb57354634b6ba851b79da45f1de42c646f27d0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43248 (GCVE-0-2026-43248)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-08 12:41

Title

vhost: move vdpa group bound check to vhost_vdpa

Summary

In the Linux kernel, the following vulnerability has been resolved: vhost: move vdpa group bound check to vhost_vdpa Remove duplication by consolidating these here. This reduces the posibility of a parent driver missing them. While we're at it, fix a bug in vdpa_sim where a valid ASID can be assigned to a group equal to ngroups, causing an out of bound write.

Severity ?

7.8 (High)


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

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/ddb57354634b6ba85…
	https://git.kernel.org/stable/c/7441d35d14d9a3d66…
	https://git.kernel.org/stable/c/406db68f9cb976a8d…
	https://git.kernel.org/stable/c/cd025c1e876b4e262…

Impacted products

Vendor

Product

Version

Linux

Affected: bda324fd037a6b0d44da5699574ce741ca161bc4 , < ddb57354634b6ba851b79da45f1de42c646f27d0 (git)
Affected: bda324fd037a6b0d44da5699574ce741ca161bc4 , < 7441d35d14d9a3d66d925d90cb73c75394e6d454 (git)
Affected: bda324fd037a6b0d44da5699574ce741ca161bc4 , < 406db68f9cb976a8ddfafd631197264f2307e9c9 (git)
Affected: bda324fd037a6b0d44da5699574ce741ca161bc4 , < cd025c1e876b4e262e71398236a1550486a73ede (git)

Linux

Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/mlx5/net/mlx5_vnet.c",
            "drivers/vdpa/vdpa_sim/vdpa_sim.c",
            "drivers/vhost/vdpa.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ddb57354634b6ba851b79da45f1de42c646f27d0",
              "status": "affected",
              "version": "bda324fd037a6b0d44da5699574ce741ca161bc4",
              "versionType": "git"
            },
            {
              "lessThan": "7441d35d14d9a3d66d925d90cb73c75394e6d454",
              "status": "affected",
              "version": "bda324fd037a6b0d44da5699574ce741ca161bc4",
              "versionType": "git"
            },
            {
              "lessThan": "406db68f9cb976a8ddfafd631197264f2307e9c9",
              "status": "affected",
              "version": "bda324fd037a6b0d44da5699574ce741ca161bc4",
              "versionType": "git"
            },
            {
              "lessThan": "cd025c1e876b4e262e71398236a1550486a73ede",
              "status": "affected",
              "version": "bda324fd037a6b0d44da5699574ce741ca161bc4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/mlx5/net/mlx5_vnet.c",
            "drivers/vdpa/vdpa_sim/vdpa_sim.c",
            "drivers/vhost/vdpa.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": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: move vdpa group bound check to vhost_vdpa\n\nRemove duplication by consolidating these here.  This reduces the\nposibility of a parent driver missing them.\n\nWhile we\u0027re at it, fix a bug in vdpa_sim where a valid ASID can be\nassigned to a group equal to ngroups, causing an out of bound write."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T12:41:33.946Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ddb57354634b6ba851b79da45f1de42c646f27d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7441d35d14d9a3d66d925d90cb73c75394e6d454"
        },
        {
          "url": "https://git.kernel.org/stable/c/406db68f9cb976a8ddfafd631197264f2307e9c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd025c1e876b4e262e71398236a1550486a73ede"
        }
      ],
      "title": "vhost: move vdpa group bound check to vhost_vdpa",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43248",
    "datePublished": "2026-05-06T11:28:39.578Z",
    "dateReserved": "2026-05-01T14:12:55.996Z",
    "dateUpdated": "2026-05-08T12:41:33.946Z",
    "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.

Action not permitted

GHSA-XPCF-MWVF-62V9

CVE-2026-43248 (GCVE-0-2026-43248)

Tags

Sightings

Nomenclature