ghsa-m4xx-f75v-xfq3
Vulnerability from github
Published
2024-11-05 18:32
Modified
2024-11-13 03:30
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:

sfc: Don't invoke xdp_do_flush() from netpoll.

Yury reported a crash in the sfc driver originated from netpoll_send_udp(). The netconsole sends a message and then netpoll invokes the driver's NAPI function with a budget of zero. It is dedicated to allow driver to free TX resources, that it may have used while sending the packet.

In the netpoll case the driver invokes xdp_do_flush() unconditionally, leading to crash because bpf_net_context was never assigned.

Invoke xdp_do_flush() only if budget is not zero.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50094"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-05T17:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: Don\u0027t invoke xdp_do_flush() from netpoll.\n\nYury reported a crash in the sfc driver originated from\nnetpoll_send_udp(). The netconsole sends a message and then netpoll\ninvokes the driver\u0027s NAPI function with a budget of zero. It is\ndedicated to allow driver to free TX resources, that it may have used\nwhile sending the packet.\n\nIn the netpoll case the driver invokes xdp_do_flush() unconditionally,\nleading to crash because bpf_net_context was never assigned.\n\nInvoke xdp_do_flush() only if budget is not zero.",
  "id": "GHSA-m4xx-f75v-xfq3",
  "modified": "2024-11-13T03:30:45Z",
  "published": "2024-11-05T18:32:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50094"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55e802468e1d38dec8e25a2fdb6078d45b647e8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65d4fc76d75c136744e67754d20feda609e7b793"
    }
  ],
  "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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