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CVE-2022-49972

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

xsk: Fix corrupted packets for XDP_SHARED_UMEM

Fix an issue in XDP_SHARED_UMEM mode together with aligned mode where packets are corrupted for the second and any further sockets bound to the same umem. In other words, this does not affect the first socket bound to the umem. The culprit for this bug is that the initialization of the DMA addresses for the pre-populated xsk buffer pool entries was not performed for any socket but the first one bound to the umem. Only the linear array of DMA addresses was populated. Fix this by populating the DMA addresses in the xsk buffer pool for every socket bound to the same umem.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "published": "2025-06-18T11:15:24.570",
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      "tags": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix corrupted packets for XDP_SHARED_UMEM\n\nFix an issue in XDP_SHARED_UMEM mode together with aligned mode where\npackets are corrupted for the second and any further sockets bound to\nthe same umem. In other words, this does not affect the first socket\nbound to the umem. The culprit for this bug is that the initialization\nof the DMA addresses for the pre-populated xsk buffer pool entries was\nnot performed for any socket but the first one bound to the umem. Only\nthe linear array of DMA addresses was populated. Fix this by populating\nthe DMA addresses in the xsk buffer pool for every socket bound to the\nsame umem."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xsk: corrige paquetes dañados para XDP_SHARED_UMEM Corrige un problema en el modo XDP_SHARED_UMEM junto con el modo alineado donde los paquetes se corrompen para el segundo socket y cualquier socket posterior vinculado al mismo umem. En otras palabras, esto no afecta al primer socket vinculado al umem. El culpable de este error es que la inicialización de las direcciones DMA para las entradas del grupo de búferes xsk pre-rellenadas no se realizó para ningún socket excepto el primero vinculado al umem. Solo se rellenó la matriz lineal de direcciones DMA. Corrige esto rellenando las direcciones DMA en el grupo de búferes xsk para cada socket vinculado al mismo umem."
    }
  ],
  "lastModified": "2026-08-04T10:18:01.430",
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