Vulnerability-Lookup

GHSA-W4MH-VMR5-87JC

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:

mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()

The cluster_cfg array is dynamically allocated to hold per-CPU configuration structures, with its size based on the number of online CPUs. Previously, this array was indexed using hartid, which may be non-contiguous or exceed the bounds of the array, leading to out-of-bounds access. Switch to using cpuid as the index, as it is guaranteed to be within the valid range provided by for_each_online_cpu().

Severity ?

8.4 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43274"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:48Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()\n\nThe cluster_cfg array is dynamically allocated to hold per-CPU\nconfiguration structures, with its size based on the number of online\nCPUs. Previously, this array was indexed using hartid, which may be\nnon-contiguous or exceed the bounds of the array, leading to\nout-of-bounds access.\nSwitch to using cpuid as the index, as it is guaranteed to be within\nthe valid range provided by for_each_online_cpu().",
  "id": "GHSA-w4mh-vmr5-87jc",
  "modified": "2026-05-08T15:31:18Z",
  "published": "2026-05-06T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43274"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43274 (GCVE-0-2026-43274)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:21

Title

mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()

Summary

In the Linux kernel, the following vulnerability has been resolved: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq() The cluster_cfg array is dynamically allocated to hold per-CPU configuration structures, with its size based on the number of online CPUs. Previously, this array was indexed using hartid, which may be non-contiguous or exceed the bounds of the array, leading to out-of-bounds access. Switch to using cpuid as the index, as it is guaranteed to be within the valid range provided by for_each_online_cpu().

Severity ?

8.4 (High)


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

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/95438699c92947155…
https://git.kernel.org/stable/c/0442b6229e2eedc95…
https://git.kernel.org/stable/c/f7c330a8c83c9b033…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e4b1d67e71419c4af581890ecea84b04920d4116 , < 95438699c92947155823dcd3918049a07f3cd867 (git) Affected: e4b1d67e71419c4af581890ecea84b04920d4116 , < 0442b6229e2eedc95a6d3d18ce75dec7f5b5377c (git) Affected: e4b1d67e71419c4af581890ecea84b04920d4116 , < f7c330a8c83c9b0332fd524097eaf3e69148164d (git)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (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-mchp-ipc-sbi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "95438699c92947155823dcd3918049a07f3cd867",
              "status": "affected",
              "version": "e4b1d67e71419c4af581890ecea84b04920d4116",
              "versionType": "git"
            },
            {
              "lessThan": "0442b6229e2eedc95a6d3d18ce75dec7f5b5377c",
              "status": "affected",
              "version": "e4b1d67e71419c4af581890ecea84b04920d4116",
              "versionType": "git"
            },
            {
              "lessThan": "f7c330a8c83c9b0332fd524097eaf3e69148164d",
              "status": "affected",
              "version": "e4b1d67e71419c4af581890ecea84b04920d4116",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/mailbox-mchp-ipc-sbi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.16",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()\n\nThe cluster_cfg array is dynamically allocated to hold per-CPU\nconfiguration structures, with its size based on the number of online\nCPUs. Previously, this array was indexed using hartid, which may be\nnon-contiguous or exceed the bounds of the array, leading to\nout-of-bounds access.\nSwitch to using cpuid as the index, as it is guaranteed to be within\nthe valid range provided by for_each_online_cpu()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:21:23.317Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867"
        },
        {
          "url": "https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c"
        },
        {
          "url": "https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d"
        }
      ],
      "title": "mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43274",
    "datePublished": "2026-05-06T11:28:57.503Z",
    "dateReserved": "2026-05-01T14:12:55.998Z",
    "dateUpdated": "2026-05-11T22:21:23.317Z",
    "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-W4MH-VMR5-87JC

CVE-2026-43274 (GCVE-0-2026-43274)

Tags

Sightings

Nomenclature