{
  "id": "CVE-2024-50130",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-11-05T18:15:15.850",
  "lastModified": "2025-03-06T17:15:18.953",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bpf: must hold reference on net namespace\n\nBUG: KASAN: slab-use-after-free in __nf_unregister_net_hook+0x640/0x6b0\nRead of size 8 at addr ffff8880106fe400 by task repro/72=\nbpf_nf_link_release+0xda/0x1e0\nbpf_link_free+0x139/0x2d0\nbpf_link_release+0x68/0x80\n__fput+0x414/0xb60\n\nEric says:\n It seems that bpf was able to defer the __nf_unregister_net_hook()\n after exit()/close() time.\n Perhaps a netns reference is missing, because the netns has been\n dismantled/freed already.\n bpf_nf_link_attach() does :\n link->net = net;\n But I do not see a reference being taken on net.\n\nAdd such a reference and release it after hook unreg.\nNote that I was unable to get syzbot reproducer to work, so I\ndo not know if this resolves this splat."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: bpf: debe contener referencia en el espacio de nombres net ERROR: KASAN: slab-use-after-free en __nf_unregister_net_hook+0x640/0x6b0 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8880106fe400 por la tarea repro/72= bpf_nf_link_release+0xda/0x1e0 bpf_link_free+0x139/0x2d0 bpf_link_release+0x68/0x80 __fput+0x414/0xb60 Eric dice: Parece que bpf pudo diferir __nf_unregister_net_hook() despu\u00e9s del tiempo de exit()/close(). Quiz\u00e1s falta una referencia a netns, porque netns ya se ha desmantelado/liberado. bpf_nf_link_attach() hace: link->net = net; Pero no veo que se tome ninguna referencia en net. Agregue dicha referencia y lib\u00e9rela despu\u00e9s de anular el registro. Tenga en cuenta que no pude hacer que funcionara el reproductor syzbot, por lo que no s\u00e9 si esto resuelve este problema."
    }
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          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
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