CVE-2022-50232

{
  "id": "CVE-2022-50232",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-06-18T11:15:54.297",
  "lastModified": "2026-11-05T20:17:28.593",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: set UXN on swapper page tables\n\n[ This issue was fixed upstream by accident in c3cee924bd85 (\"arm64:\n  head: cover entire kernel image in initial ID map\") as part of a\n  large refactoring of the arm64 boot flow. This simple fix is therefore\n  preferred for -stable backporting ]\n\nOn a system that implements FEAT_EPAN, read/write access to the idmap\nis denied because UXN is not set on the swapper PTEs. As a result,\nidmap_kpti_install_ng_mappings panics the kernel when accessing\n__idmap_kpti_flag. Fix it by setting UXN on these PTEs."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: establecer UXN en las tablas de páginas del intercambiador [Este problema se corrigió accidentalmente en c3cee924bd85 (\"arm64: head: cubrir toda la imagen del kernel en el mapa de ID inicial\") como parte de una refactorización a gran escala del flujo de arranque de arm64. Por lo tanto, esta sencilla solución es la preferida para la retroportación de -stable]. En un sistema que implementa FEAT_EPAN, se deniega el acceso de lectura/escritura al mapa de ID porque UXN no está establecido en las PTE del intercambiador. Como resultado, idmap_kpti_install_ng_mappings genera un pánico en el kernel al acceder a __idmap_kpti_flag. Se soluciona estableciendo UXN en estas PTE."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "arch/arm64/include/asm/kernel-pgtable.h",
            "arch/arm64/kernel/head.S"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "18107f8a2df6bf1c6cac8d0713f757f866d5af51",
              "lessThan": "775871d4be0d75e219cca937af843a4a1b60489a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "18107f8a2df6bf1c6cac8d0713f757f866d5af51",
              "lessThan": "c3cee924bd855184d15bc4aa6088dcf8e2c1394c",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "arch/arm64/include/asm/kernel-pgtable.h",
            "arch/arm64/kernel/head.S"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.13",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.13",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.60",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.0",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-11-05T20:07:31.404271Z",
          "id": "CVE-2022-50232",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
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    }
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  "configurations": [
    {
      "nodes": [
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          "operator": "OR",
          "negate": false,
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              "vulnerable": true,
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  "references": [
    {
      "url": "https://git.kernel.org/stable/c/775871d4be0d75e219cca937af843a4a1b60489a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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}