CVE-2026-89446 (GCVE-0-2026-89446)
Vulnerability from cvelistv5
Published
2026-09-11 19:43
Modified
2026-10-19 08:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iommufd: Release current IOAS on xa_store() failure iommufd_take_all_iova_rwsem() takes an object reference and the iova_rwsem write lock before storing the IOAS in the temporary ioas_list xarray. If xa_store() fails, the current IOAS has not been inserted into ioas_list yet. iommufd_release_all_iova_rwsem() only unwinds IOAS objects already present in that xarray, so it cannot release the current IOAS. Release the current IOAS rwsem and object reference before unwinding the previously stored entries.
References
Impacted products
Vendor Product Version
Linux Linux Version: 051ae5aa73d782a8be2699a11e17c68f28b4e758
Version: 051ae5aa73d782a8be2699a11e17c68f28b4e758
Version: 051ae5aa73d782a8be2699a11e17c68f28b4e758
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/ioas.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4c33d00ad9a911e87ea222986f732ce072e3aa26",
              "status": "affected",
              "version": "051ae5aa73d782a8be2699a11e17c68f28b4e758",
              "versionType": "git"
            },
            {
              "lessThan": "07b4fe1367f076886c1c47a19c70936138325087",
              "status": "affected",
              "version": "051ae5aa73d782a8be2699a11e17c68f28b4e758",
              "versionType": "git"
            },
            {
              "lessThan": "4ac2ce123824d5f885c868fa1f9f4d463141a2ba",
              "status": "affected",
              "version": "051ae5aa73d782a8be2699a11e17c68f28b4e758",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/ioas.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Release current IOAS on xa_store() failure\n\niommufd_take_all_iova_rwsem() takes an object reference and the\niova_rwsem write lock before storing the IOAS in the temporary ioas_list\nxarray.\n\nIf xa_store() fails, the current IOAS has not been inserted into\nioas_list yet. iommufd_release_all_iova_rwsem() only unwinds IOAS\nobjects already present in that xarray, so it cannot release the current\nIOAS.\n\nRelease the current IOAS rwsem and object reference before unwinding the\npreviously stored entries."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:46:55.828Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4c33d00ad9a911e87ea222986f732ce072e3aa26"
        },
        {
          "url": "https://git.kernel.org/stable/c/07b4fe1367f076886c1c47a19c70936138325087"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ac2ce123824d5f885c868fa1f9f4d463141a2ba"
        }
      ],
      "title": "iommufd: Release current IOAS on xa_store() failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89446",
    "datePublished": "2026-09-11T19:43:13.431Z",
    "dateReserved": "2026-09-11T19:38:34.704Z",
    "dateUpdated": "2026-10-19T08:46:55.828Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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