CVE-2026-90192 (GCVE-0-2026-90192)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 08:59
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mailbox: qcom-cpucp: handle NULL data in send_data callback mailbox_clear_channel() calls mbox_send_message() with NULL data to notify the remote side that the RX channel has been cleared. qcom_cpucp_mbox_send_data() blindly dereferenced the data pointer, causing a NULL pointer dereference kernel panic when invoked from this path under PREEMPT_RT. Add an explicit NULL check and return early without writing to the TX register, which is the correct behaviour for a channel-clear notification.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0e2a9a03106cd5fa0dbc9047675e7645c55e2669
Version: 0e2a9a03106cd5fa0dbc9047675e7645c55e2669
Version: 0e2a9a03106cd5fa0dbc9047675e7645c55e2669
Version: 0e2a9a03106cd5fa0dbc9047675e7645c55e2669
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/qcom-cpucp-mbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/qcom-cpucp-mbox.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"
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "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",
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                {
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                  "versionEndExcluding": "7.3",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: qcom-cpucp: handle NULL data in send_data callback\n\nmailbox_clear_channel() calls mbox_send_message() with NULL data to\nnotify the remote side that the RX channel has been cleared.\nqcom_cpucp_mbox_send_data() blindly dereferenced the data pointer,\ncausing a NULL pointer dereference kernel panic when invoked from\nthis path under PREEMPT_RT.\n\nAdd an explicit NULL check and return early without writing to the\nTX register, which is the correct behaviour for a channel-clear\nnotification."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:59:28.843Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3d11d2a6c9a10de287e0f1b53a5e65d16afe2760"
        },
        {
          "url": "https://git.kernel.org/stable/c/413b0b94d6d06b8d49735280e86a01dac90cf177"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3d73e7440e0c40644285be1bda349cdf90122d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc4f2f99530298a1739226947aa76525142d421d"
        }
      ],
      "title": "mailbox: qcom-cpucp: handle NULL data in send_data callback",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90192",
    "datePublished": "2026-09-17T16:07:12.995Z",
    "dateReserved": "2026-09-11T19:38:34.792Z",
    "dateUpdated": "2026-10-19T08:59:28.843Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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