CVE-2026-43281 (GCVE-0-2026-43281)
Vulnerability from cvelistv5
Published
2026-05-06 11:29
Modified
2026-06-01 16:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate() Although it is guided that `#mbox-cells` must be at least 1, there are many instances of `#mbox-cells = <0>;` in the device tree. If that is the case and the corresponding mailbox controller does not provide `fw_xlate` and of_xlate` function pointers, `fw_mbox_index_xlate()` will be used by default and out-of-bounds accesses could occur due to lack of bounds check in that function.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
Version: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/mailbox.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "lessThan": "3.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
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            },
            {
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              "status": "unaffected",
              "version": "5.15.209",
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            },
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
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              "status": "unaffected",
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            },
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              "version": "6.18.16",
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            },
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              "status": "unaffected",
              "version": "6.19.6",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()\n\nAlthough it is guided that `#mbox-cells` must be at least 1, there are\nmany instances of `#mbox-cells = \u003c0\u003e;` in the device tree. If that is\nthe case and the corresponding mailbox controller does not provide\n`fw_xlate` and of_xlate` function pointers, `fw_mbox_index_xlate()` will\nbe used by default and out-of-bounds accesses could occur due to lack of\nbounds check in that function."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-01T16:15:32.145Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2c7ff651ec6b660c7c96a36db9328b3232f555d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec0874447895b994182a962d2fee9ef075de5efd"
        },
        {
          "url": "https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f"
        },
        {
          "url": "https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265"
        },
        {
          "url": "https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310"
        }
      ],
      "title": "mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43281",
    "datePublished": "2026-05-06T11:29:02.278Z",
    "dateReserved": "2026-05-01T14:12:55.998Z",
    "dateUpdated": "2026-06-01T16:15:32.145Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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