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CVE-2025-22103

Estado: ModificadaMedia (5.5)—

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

net: fix NULL pointer dereference in l3mdev_l3_rcv

When delete l3s ipvlan:

This may cause a null pointer dereference:

This is because l3mdev_l3_rcv() visit dev->l3mdev_ops after ipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process like this:

To avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan.

Detalles técnicos trazas, registros y código del informe original
    ip link del link eth0 ipvlan1 type ipvlan mode l3s

    Call trace:
     ip_rcv_finish+0x48/0xd0
     ip_rcv+0x5c/0x100
     __netif_receive_skb_one_core+0x64/0xb0
     __netif_receive_skb+0x20/0x80
     process_backlog+0xb4/0x204
     napi_poll+0xe8/0x294
     net_rx_action+0xd8/0x22c
     __do_softirq+0x12c/0x354

    (CPU1)                     | (CPU2)
    l3mdev_l3_rcv()            |
      check dev->priv_flags:   |
        master = skb->dev;     |
                               |
                               | ipvlan_l3s_unregister()
                               |   set dev->priv_flags
                               |   dev->l3mdev_ops = NULL;
                               |
      visit master->l3mdev_ops |

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)

Mostrar
{
  "id": "CVE-2025-22103",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
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      "affectedData": [
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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          "programFiles": [
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          ],
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        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
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              "version": "0",
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            {
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              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
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            {
              "status": "unaffected",
              "version": "5.15.221",
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            {
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              "versionType": "semver",
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              "version": "6.6.117",
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          ],
          "programFiles": [
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          ],
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        }
      ]
    }
  ],
  "published": "2025-04-16T15:16:04.650",
  "references": [
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      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix NULL pointer dereference in l3mdev_l3_rcv\n\nWhen delete l3s ipvlan:\n\n    ip link del link eth0 ipvlan1 type ipvlan mode l3s\n\nThis may cause a null pointer dereference:\n\n    Call trace:\n     ip_rcv_finish+0x48/0xd0\n     ip_rcv+0x5c/0x100\n     __netif_receive_skb_one_core+0x64/0xb0\n     __netif_receive_skb+0x20/0x80\n     process_backlog+0xb4/0x204\n     napi_poll+0xe8/0x294\n     net_rx_action+0xd8/0x22c\n     __do_softirq+0x12c/0x354\n\nThis is because l3mdev_l3_rcv() visit dev->l3mdev_ops after\nipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process\nlike this:\n\n    (CPU1)                     | (CPU2)\n    l3mdev_l3_rcv()            |\n      check dev->priv_flags:   |\n        master = skb->dev;     |\n                               |\n                               | ipvlan_l3s_unregister()\n                               |   set dev->priv_flags\n                               |   dev->l3mdev_ops = NULL;\n                               |\n      visit master->l3mdev_ops |\n\nTo avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: corregir la desreferencia de puntero nulo en l3mdev_l3_rcv Al eliminar l3s ipvlan: ip link del link eth0 ipvlan1 type ipvlan mode l3s Esto puede causar una desreferencia de puntero nulo: Rastreo de llamada: ip_rcv_finish+0x48/0xd0 ip_rcv+0x5c/0x100 __netif_receive_skb_one_core+0x64/0xb0 __netif_receive_skb+0x20/0x80 process_backlog+0xb4/0x204 napi_poll+0xe8/0x294 net_rx_action+0xd8/0x22c __do_softirq+0x12c/0x354 Esto se debe a que l3mdev_l3_rcv() visita Después de ejecutar ipvlan_l3s_unregister(), dev->l3mdev_ops asigna el valor NULL a dev->l3mdev_ops. El proceso es el siguiente: (CPU1) | (CPU2) l3mdev_l3_rcv() | check dev->priv_flags: | master = skb->dev; | | | ipvlan_l3s_unregister() | set dev->priv_flags | dev->l3mdev_ops = NULL; | visit master->l3mdev_ops | Para evitar esto, no configure dev->l3mdev_ops al cancelar el registro de ipvlan l3s."
    }
  ],
  "lastModified": "2026-09-14T12:17:35.353",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}