CVE-2026-93082 (GCVE-0-2026-93082)
Vulnerability from cvelistv5
Published
2026-09-17 16:11
Modified
2026-10-19 09:05
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Unwind P2A receiver mailbox setup failure mailbox_chan_setup() can request an additional P2A receiver channel after successfully acquiring the primary P2A channel. If that later request fails, the function returns immediately and leaves the primary channel allocated. Unwind the primary mailbox channel before returning the error so probe deferral or other setup failures do not leave the channel busy for later probe attempts.
References
Impacted products
Vendor Product Version
Linux Linux Version: fa8b28ba22d95be4d2dd3c37fbdbdc066af82941
Version: fa8b28ba22d95be4d2dd3c37fbdbdc066af82941
Version: fa8b28ba22d95be4d2dd3c37fbdbdc066af82941
Version: fa8b28ba22d95be4d2dd3c37fbdbdc066af82941
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/transports/mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4c2a5d72357e5c6743c23b59615da287140d9d31",
              "status": "affected",
              "version": "fa8b28ba22d95be4d2dd3c37fbdbdc066af82941",
              "versionType": "git"
            },
            {
              "lessThan": "3b0b02134ab90202af80b102fa37196b9689e86f",
              "status": "affected",
              "version": "fa8b28ba22d95be4d2dd3c37fbdbdc066af82941",
              "versionType": "git"
            },
            {
              "lessThan": "3515aed7fe424b79c49ff9cd51f7802a64a4ab7b",
              "status": "affected",
              "version": "fa8b28ba22d95be4d2dd3c37fbdbdc066af82941",
              "versionType": "git"
            },
            {
              "lessThan": "f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d",
              "status": "affected",
              "version": "fa8b28ba22d95be4d2dd3c37fbdbdc066af82941",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/transports/mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "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": "6.12.110",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Unwind P2A receiver mailbox setup failure\n\nmailbox_chan_setup() can request an additional P2A receiver channel after\nsuccessfully acquiring the primary P2A channel. If that later request\nfails, the function returns immediately and leaves the primary channel\nallocated.\n\nUnwind the primary mailbox channel before returning the error so probe\ndeferral or other setup failures do not leave the channel busy for later\nprobe attempts."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:05:17.992Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4c2a5d72357e5c6743c23b59615da287140d9d31"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b0b02134ab90202af80b102fa37196b9689e86f"
        },
        {
          "url": "https://git.kernel.org/stable/c/3515aed7fe424b79c49ff9cd51f7802a64a4ab7b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d"
        }
      ],
      "title": "firmware: arm_scmi: Unwind P2A receiver mailbox setup failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93082",
    "datePublished": "2026-09-17T16:11:02.339Z",
    "dateReserved": "2026-09-17T15:57:05.662Z",
    "dateUpdated": "2026-10-19T09:05:17.992Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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