fkie_cve-2022-49001
Vulnerability from fkie_nvd
Published
2024-10-21 20:15
Modified
2024-10-30 18:58
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vmap stack overflow, riscv firstly switches to the so called shadow stack, then use this shadow stack to call the get_overflow_stack() to get the overflow stack. However, there's a race here if two or more harts use the same shadow stack at the same time. To solve this race, we introduce spin_shadow_stack atomic var, which will be swap between its own address and 0 in atomic way, when the var is set, it means the shadow_stack is being used; when the var is cleared, it means the shadow_stack isn't being used. [Palmer: Add AQ to the swap, and also some comments.]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/879fabc5a95401d9bce357e4b1d24ae4a360a81fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac00301adb19df54f2eae1efc4bad7447c0156cePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1


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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: fix race when vmap stack overflow\n\nCurrently, when detecting vmap stack overflow, riscv firstly switches\nto the so called shadow stack, then use this shadow stack to call the\nget_overflow_stack() to get the overflow stack. However, there\u0027s\na race here if two or more harts use the same shadow stack at the same\ntime.\n\nTo solve this race, we introduce spin_shadow_stack atomic var, which\nwill be swap between its own address and 0 in atomic way, when the\nvar is set, it means the shadow_stack is being used; when the var\nis cleared, it means the shadow_stack isn\u0027t being used.\n\n[Palmer: Add AQ to the swap, and also some comments.]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: riscv: arregla la ejecuci\u00f3n cuando se desborda la pila de vmap Actualmente, al detectar un desbordamiento de la pila de vmap, riscv primero cambia a la llamada pila de sombra, luego usa esta pila de sombra para llamar a get_overflow_stack() para obtener la pila de desbordamiento. Sin embargo, aqu\u00ed hay una ejecuci\u00f3n si dos o m\u00e1s harts usan la misma pila de sombra al mismo tiempo. Para resolver esta ejecuci\u00f3n, introducimos la variable at\u00f3mica spin_shadow_stack, que se intercambiar\u00e1 entre su propia direcci\u00f3n y 0 de forma at\u00f3mica, cuando la variable est\u00e1 configurada, significa que se est\u00e1 usando shadow_stack; cuando la variable se borra, significa que no se est\u00e1 usando shadow_stack. [Palmer: Agrega AQ al intercambio y tambi\u00e9n algunos comentarios]."
    }
  ],
  "id": "CVE-2022-49001",
  "lastModified": "2024-10-30T18:58:53.863",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-10-21T20:15:11.773",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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