{
  "id": "CVE-2022-48809",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-16T12:15:05.190",
  "lastModified": "2024-08-07T19:18:21.437",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix a memleak when uncloning an skb dst and its metadata\n\nWhen uncloning an skb dst and its associated metadata, a new\ndst+metadata is allocated and later replaces the old one in the skb.\nThis is helpful to have a non-shared dst+metadata attached to a specific\nskb.\n\nThe issue is the uncloned dst+metadata is initialized with a refcount of\n1, which is increased to 2 before attaching it to the skb. When\ntun_dst_unclone returns, the dst+metadata is only referenced from a\nsingle place (the skb) while its refcount is 2. Its refcount will never\ndrop to 0 (when the skb is consumed), leading to a memory leak.\n\nFix this by removing the call to dst_hold in tun_dst_unclone, as the\ndst+metadata refcount is already 1."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: soluciona un memleak al desaclonar un skb dst y sus metadatos Al desaclonar un skb dst y sus metadatos asociados, se asigna un nuevo dst+metadatos que luego reemplaza al antiguo en el skb. Esto es \u00fatil para tener metadatos dst+ no compartidos adjuntos a un skb espec\u00edfico. El problema es que los metadatos dst+ no clonados se inicializan con un recuento de 1, que se incrementa a 2 antes de adjuntarlo al skb. Cuando tun_dst_unclone regresa, solo se hace referencia a los metadatos dst+ desde un \u00fanico lugar (el skb) mientras su refcount es 2. Su refcount nunca bajar\u00e1 a 0 (cuando se consume el skb), lo que provoca una p\u00e9rdida de memoria. Solucione este problema eliminando la llamada a dst_hold en tun_dst_unclone, ya que el recuento de metadatos dst+ ya es 1."
    }
  ],
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
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        "impactScore": 3.6
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