ghsa-mcrm-9h74-fxh7
Vulnerability from github
Published
2024-10-21 12:30
Modified
2024-10-24 15:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

netkit: Assign missing bpf_net_context

During the introduction of struct bpf_net_context handling for XDP-redirect, the netkit driver has been missed, which also requires it because NETKIT_REDIRECT invokes skb_do_redirect() which is accessing the per-CPU variables. Otherwise we see the following crash:

BUG: kernel NULL pointer dereference, address: 0000000000000038
bpf_redirect()
netkit_xmit()
dev_hard_start_xmit()

Set the bpf_net_context before invoking netkit_xmit() program within the netkit driver.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-47708"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T12:15:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetkit: Assign missing bpf_net_context\n\nDuring the introduction of struct bpf_net_context handling for\nXDP-redirect, the netkit driver has been missed, which also requires it\nbecause NETKIT_REDIRECT invokes skb_do_redirect() which is accessing the\nper-CPU variables. Otherwise we see the following crash:\n\n\tBUG: kernel NULL pointer dereference, address: 0000000000000038\n\tbpf_redirect()\n\tnetkit_xmit()\n\tdev_hard_start_xmit()\n\nSet the bpf_net_context before invoking netkit_xmit() program within the\nnetkit driver.",
  "id": "GHSA-mcrm-9h74-fxh7",
  "modified": "2024-10-24T15:31:08Z",
  "published": "2024-10-21T12:30:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47708"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/157f29152b61ca41809dd7ead29f5733adeced19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/182c6fed8c7f62cddce0126ec1fc0da2b700fb11"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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