ghsa-pj9w-f8jv-85cc
Vulnerability from github
Published
2024-06-21 12:31
Modified
2024-06-24 21:33
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Details

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

bpf: Allow delete from sockmap/sockhash only if update is allowed

We have seen an influx of syzkaller reports where a BPF program attached to a tracepoint triggers a locking rule violation by performing a map_delete on a sockmap/sockhash.

We don't intend to support this artificial use scenario. Extend the existing verifier allowed-program-type check for updating sockmap/sockhash to also cover deleting from a map.

From now on only BPF programs which were previously allowed to update sockmap/sockhash can delete from these map types.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-38662"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-21T12:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Allow delete from sockmap/sockhash only if update is allowed\n\nWe have seen an influx of syzkaller reports where a BPF program attached to\na tracepoint triggers a locking rule violation by performing a map_delete\non a sockmap/sockhash.\n\nWe don\u0027t intend to support this artificial use scenario. Extend the\nexisting verifier allowed-program-type check for updating sockmap/sockhash\nto also cover deleting from a map.\n\nFrom now on only BPF programs which were previously allowed to update\nsockmap/sockhash can delete from these map types.",
  "id": "GHSA-pj9w-f8jv-85cc",
  "modified": "2024-06-24T21:33:19Z",
  "published": "2024-06-21T12:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38662"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/000a65bf1dc04fb2b65e2abf116f0bc0fc2ee7b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11e8ecc5b86037fec43d07b1c162e233e131b1d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29467edc23818dc5a33042ffb4920b49b090e63d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6693b172f008846811f48a099f33effc26068e1e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98e948fb60d41447fd8d2d0c3b8637fc6b6dc26d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b81e1c5a3c70398cf76631ede63a03616ed1ba3c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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