fkie_cve-2022-48770
Vulnerability from fkie_nvd
Published
2024-06-20 12:15
Modified
2025-01-06 21:43
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: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A75B48E6-C776-4B8B-BA0B-F11FFE5DC260",
              "versionEndExcluding": "5.10.96",
              "versionStartIncluding": "5.9",
              "vulnerable": true
            },
            {
              "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\nbpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()\n\ntask_pt_regs() can return NULL on powerpc for kernel threads. This is\nthen used in __bpf_get_stack() to check for user mode, resulting in a\nkernel oops. Guard against this by checking return value of\ntask_pt_regs() before trying to obtain the call chain."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: protecci\u00f3n contra el acceso a pt_regs NULL en bpf_get_task_stack() task_pt_regs() puede devolver NULL en powerpc para subprocesos del kernel. Luego, esto se usa en __bpf_get_stack() para verificar el modo de usuario, lo que genera un kernel ups. Prot\u00e9jase contra esto verificando el valor de retorno de task_pt_regs() antes de intentar obtener la cadena de llamadas."
    }
  ],
  "id": "CVE-2022-48770",
  "lastModified": "2025-01-06T21:43:45.823",
  "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"
      }
    ]
  },
  "published": "2024-06-20T12:15:14.953",
  "references": [
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      "url": "https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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