ghsa-2qmc-x97c-8pmc
Vulnerability from github
Published
2025-12-30 15:30
Modified
2025-12-30 15:30
Details

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

tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50865"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:16:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix a signed-integer-overflow bug in tcp_add_backlog()\n\nThe type of sk_rcvbuf and sk_sndbuf in struct sock is int, and\nin tcp_add_backlog(), the variable limit is caculated by adding\nsk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value\nof int and overflow. This patch reduces the limit budget by\nhalving the sndbuf to solve this issue since ACK packets are much\nsmaller than the payload.",
  "id": "GHSA-2qmc-x97c-8pmc",
  "modified": "2025-12-30T15:30:28Z",
  "published": "2025-12-30T15:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50865"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28addf029417d53b1df062b4c87feb7bc033cb5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f23cb2be530785db284a685d1b1c30224d8a538"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d04b4d0feee12bce6bfe37f30d8e953d3c30368"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a85d39f14aa8a71e29cfb5eb5de02878a8779898"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec791d8149ff60c40ad2074af3b92a39c916a03f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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