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


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
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                     versionEndExcluding: "5.15.82",
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                     vulnerable: true,
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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's\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't 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 ejecución 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, aquí hay una ejecución si dos o más harts usan la misma pila de sombra al mismo tiempo. Para resolver esta ejecución, introducimos la variable atómica spin_shadow_stack, que se intercambiará entre su propia dirección y 0 de forma atómica, cuando la variable está configurada, significa que se está usando shadow_stack; cuando la variable se borra, significa que no se está usando shadow_stack. [Palmer: Agrega AQ al intercambio y también algunos comentarios].",
      },
   ],
   id: "CVE-2022-49001",
   lastModified: "2024-10-30T18:58:53.863",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "HIGH",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 7,
               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,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-10-21T20:15:11.773",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         url: "https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128",
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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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