CVE-2022-50043

{
  "id": "CVE-2022-50043",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-06-18T11:15:32.787",
  "lastModified": "2026-11-05T20:17:21.393",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix potential refcount leak in ndisc_router_discovery()\n\nThe issue happens on specific paths in the function. After both the\nobject `rt` and `neigh` are grabbed successfully, when `lifetime` is\nnonzero but the metric needs change, the function just deletes the\nroute and set `rt` to NULL. Then, it may try grabbing `rt` and `neigh`\nagain if above conditions hold. The function simply overwrite `neigh`\nif succeeds or returns if fails, without decreasing the reference\ncount of previous `neigh`. This may result in memory leaks.\n\nFix it by decrementing the reference count of `neigh` in place."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: corrección de una posible fuga de referencias en ndisc_router_discovery(). El problema se produce en rutas específicas de la función. Tras la captura correcta de los objetos `rt` y `neigh`, cuando `lifetime` es distinto de cero pero la métrica necesita cambiar, la función simplemente elimina la ruta y establece `rt` en NULL. A continuación, puede intentar capturar `rt` y `neigh` de nuevo si se cumplen las condiciones anteriores. La función simplemente sobrescribe `neigh` si tiene éxito o retorna si falla, sin reducir la cantidad de referencias de `neigh` anterior. Esto puede provocar fugas de memoria. Para solucionarlo, reduzca la cantidad de referencias de `neigh` en su lugar."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "net/ipv6/ndisc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6b2e04bc240fe9be9e690059f710e9f95346d34d",
              "lessThan": "ffb15594433391fd7885eb88ce5a7f7bdeefbb15",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6b2e04bc240fe9be9e690059f710e9f95346d34d",
              "lessThan": "7998043d31d000c3a93f46182e6569dd0eecda34",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6b2e04bc240fe9be9e690059f710e9f95346d34d",
              "lessThan": "7396ba87f1edf549284869451665c7c4e74ecd4f",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "net/ipv6/ndisc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.12",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.63",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.19.4",
              "lessThanOrEqual": "5.19.*",
              "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": "2026-11-05T19:53:20.660559Z",
          "id": "CVE-2022-50043",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "configurations": [
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      "nodes": [
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  "references": [
    {
      "url": "https://git.kernel.org/stable/c/7396ba87f1edf549284869451665c7c4e74ecd4f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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}