ghsa-29wv-m5qw-5h7j
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

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

bpf: Don't redirect packets with invalid pkt_len

Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any skbs, that is, the flow->head is null. The root cause, as the [2] says, is because that bpf_prog_test_run_skb() run a bpf prog which redirects empty skbs. So we should determine whether the length of the packet modified by bpf prog or others like bpf_prog_test is valid before forwarding it directly.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49975"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:24Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Don\u0027t redirect packets with invalid pkt_len\n\nSyzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any\nskbs, that is, the flow-\u003ehead is null.\nThe root cause, as the [2] says, is because that bpf_prog_test_run_skb()\nrun a bpf prog which redirects empty skbs.\nSo we should determine whether the length of the packet modified by bpf\nprog or others like bpf_prog_test is valid before forwarding it directly.",
  "id": "GHSA-29wv-m5qw-5h7j",
  "modified": "2025-06-18T12:30:39Z",
  "published": "2025-06-18T12:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49975"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6204bf78b2a903b96ba43afff6abc0b04d6e0462"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72f2dc8993f10262092745a88cb2dd0fef094f23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b68e53d56697a59b5c53893b53f508bbdf272a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a75987714bd2d8e59840667a28e15c1fa5c47554"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd1894224407c484f652ad456e1ce423e89bb3eb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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