fkie_cve-2024-58084
Vulnerability from fkie_nvd
Published
2025-03-06 17:15
Modified
2025-10-01 20:18
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool() Commit 2e4955167ec5 ("firmware: qcom: scm: Fix __scm and waitq completion variable initialization") introduced a write barrier in probe function to store global '__scm' variable. We all known barriers are paired (see memory-barriers.txt: "Note that write barriers should normally be paired with read or address-dependency barriers"), therefore accessing it from concurrent contexts requires read barrier. Previous commit added such barrier in qcom_scm_is_available(), so let's use that directly. Lack of this read barrier can result in fetching stale '__scm' variable value, NULL, and dereferencing it. Note that barrier in qcom_scm_is_available() satisfies here the control dependency.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b628510397b5cafa1f5d3e848a28affd1c635302Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e03db7c1255ebabba5e1a447754faeb138de15a2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fee921e3c641f64185abee83f9a6e65f0b380682Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7C014E1B-02EA-488C-AD8B-52F51437381F",
              "versionEndIncluding": "6.12.14",
              "versionStartIncluding": "6.11",
              "vulnerable": true
            },
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool()\n\nCommit 2e4955167ec5 (\"firmware: qcom: scm: Fix __scm and waitq\ncompletion variable initialization\") introduced a write barrier in probe\nfunction to store global \u0027__scm\u0027 variable.  We all known barriers are\npaired (see memory-barriers.txt: \"Note that write barriers should\nnormally be paired with read or address-dependency barriers\"), therefore\naccessing it from concurrent contexts requires read barrier.  Previous\ncommit added such barrier in qcom_scm_is_available(), so let\u0027s use that\ndirectly.\n\nLack of this read barrier can result in fetching stale \u0027__scm\u0027 variable\nvalue, NULL, and dereferencing it.\n\nNote that barrier in qcom_scm_is_available() satisfies here the control\ndependency."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: firmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool() el commit 2e4955167ec5 (\"firmware: qcom: scm: Fix __scm and waitq ending variable initialization\") introdujo una barrera de escritura en la funci\u00f3n de sondeo para almacenar la variable global \u0027__scm\u0027. Todos sabemos que las barreras est\u00e1n emparejadas (consulte memory-barriers.txt: \"Note que las barreras de escritura normalmente deben emparejarse con barreras de lectura o de dependencia de direcci\u00f3n\"), por lo tanto, acceder a ellas desde contextos concurrentes requiere una barrera de lectura. Una confirmaci\u00f3n anterior agreg\u00f3 dicha barrera en qcom_scm_is_available(), as\u00ed que us\u00e9mosla directamente. La falta de esta barrera de lectura puede resultar en la obtenci\u00f3n del valor de la variable \u0027__scm\u0027 obsoleto, NULL, y su desreferenciaci\u00f3n. Tenga en cuenta que la barrera en qcom_scm_is_available() satisface aqu\u00ed la dependencia de control."
    }
  ],
  "id": "CVE-2024-58084",
  "lastModified": "2025-10-01T20:18:14.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
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  "published": "2025-03-06T17:15:21.890",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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