FKIE_CVE-2024-49943

Vulnerability from fkie_nvd - Published: 2024-10-21 18:15 - Updated: 2024-11-01 14:54
Severity ?
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: drm/xe/guc_submit: add missing locking in wedged_fini Any non-wedged queue can have a zero refcount here and can be running concurrently with an async queue destroy, therefore dereferencing the queue ptr to check wedge status after the lookup can trigger UAF if queue is not wedged. Fix this by keeping the submission_state lock held around the check to postpone the free and make the check safe, before dropping again around the put() to avoid the deadlock. (cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/790533e44bfc7af929842fccd9674c9f424d4627Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d88f9bab7e62dd0dbe983fa70cf040042a60cc84Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.12
To clipboard 

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  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9",
              "versionEndExcluding": "6.11.3",
              "versionStartIncluding": "6.11",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc_submit: add missing locking in wedged_fini\n\nAny non-wedged queue can have a zero refcount here and can be running\nconcurrently with an async queue destroy, therefore dereferencing the\nqueue ptr to check wedge status after the lookup can trigger UAF if\nqueue is not wedged.  Fix this by keeping the submission_state lock held\naround the check to postpone the free and make the check safe, before\ndropping again around the put() to avoid the deadlock.\n\n(cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/xe/guc_submit: agregar bloqueo faltante en wedged_fini Cualquier cola no en cu\u00f1a puede tener un recuento de referencias cero aqu\u00ed y puede ejecutarse simult\u00e1neamente con una destrucci\u00f3n de cola asincr\u00f3nica, por lo tanto, desreferenciar el ptr de la cola para verificar el estado de cu\u00f1a despu\u00e9s de la b\u00fasqueda puede activar UAF si la cola no est\u00e1 en cu\u00f1a. Solucione esto manteniendo el bloqueo submission_state en torno a la verificaci\u00f3n para posponer la liberaci\u00f3n y hacer que la verificaci\u00f3n sea segura, antes de volver a soltarlo en torno a put() para evitar el punto muerto. (seleccionado de el commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)"
    }
  ],
  "id": "CVE-2024-49943",
  "lastModified": "2024-11-01T14:54:07.897",
  "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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  },
  "published": "2024-10-21T18:15:15.920",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-667"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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