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GHSA-78GQ-46GF-2HPP

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 21:31

Details

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_xlatefunction 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.

Severity ?

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43281"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:49Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-78gq-46gf-2hpp",
  "modified": "2026-05-08T21:31:22Z",
  "published": "2026-05-06T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43281"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43281 (GCVE-0-2026-43281)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:29 – Updated: 2026-05-11 22:21

Title

mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/2662ed331a69c0b55…
https://git.kernel.org/stable/c/31c4c67dec3362094…
https://git.kernel.org/stable/c/01d9a8c2615d436b2…
https://git.kernel.org/stable/c/4caae8168d1b808c7…
https://git.kernel.org/stable/c/f50b39fd7c72a8734…
https://git.kernel.org/stable/c/fcd7f96c783626c07…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c , < 2662ed331a69c0b551f78af58f12eb629a89a36f (git) Affected: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c , < 31c4c67dec3362094a6747a171a4848e98542265 (git) Affected: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c , < 01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d (git) Affected: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c , < 4caae8168d1b808c7d4ff481295292e3f97f90fb (git) Affected: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c , < f50b39fd7c72a8734153644ee945ca0d8b2e65ab (git) Affected: 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c , < fcd7f96c783626c07ee3ed75fa3739a8a2052310 (git)
Linux	Linux	Affected: 3.18 Unaffected: 0 , < 3.18 (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.77 , ≤ 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/mailbox/mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2662ed331a69c0b551f78af58f12eb629a89a36f",
              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
              "version": "2b6d83e2b8b7de82331a6a1dcd64b51020a6031c",
              "versionType": "git"
            },
            {
              "lessThan": "01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d",
              "status": "affected",
              "version": "2b6d83e2b8b7de82331a6a1dcd64b51020a6031c",
              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
              "lessThan": "f50b39fd7c72a8734153644ee945ca0d8b2e65ab",
              "status": "affected",
              "version": "2b6d83e2b8b7de82331a6a1dcd64b51020a6031c",
              "versionType": "git"
            },
            {
              "lessThan": "fcd7f96c783626c07ee3ed75fa3739a8a2052310",
              "status": "affected",
              "version": "2b6d83e2b8b7de82331a6a1dcd64b51020a6031c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/mailbox.c"
          ],
          "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": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.77",
              "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:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.18",
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                },
                {
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                },
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                  "versionEndExcluding": "6.19.6",
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                },
                {
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                  "versionStartIncluding": "3.18",
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                }
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              "operator": "OR"
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        }
      ],
      "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": "2026-05-11T22:21:31.452Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f"
        },
        {
          "url": "https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265"
        },
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          "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": "2026-05-11T22:21:31.452Z",
    "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-78GQ-46GF-2HPP

CVE-2026-43281 (GCVE-0-2026-43281)

Tags

Sightings

Nomenclature