ghsa-mqxf-7jx4-2h8p
Vulnerability from github
Published
2024-06-19 15:30
Modified
2024-11-08 18:30
Severity ?
6.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Details

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

RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt

In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the resp_pkts queue and then a decision is made whether to run the completer task inline or schedule it. Finally the skb is dereferenced to bump a 'hw' performance counter. This is wrong because if the completer task is already running in a separate thread it may have already processed the skb and freed it which can cause a seg fault. This has been observed infrequently in testing at high scale.

This patch fixes this by changing the order of enqueuing the packet until after the counter is accessed.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-38544"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T14:15:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix seg fault in rxe_comp_queue_pkt\n\nIn rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the\nresp_pkts queue and then a decision is made whether to run the completer\ntask inline or schedule it. Finally the skb is dereferenced to bump a \u0027hw\u0027\nperformance counter. This is wrong because if the completer task is\nalready running in a separate thread it may have already processed the skb\nand freed it which can cause a seg fault.  This has been observed\ninfrequently in testing at high scale.\n\nThis patch fixes this by changing the order of enqueuing the packet until\nafter the counter is accessed.",
  "id": "GHSA-mqxf-7jx4-2h8p",
  "modified": "2024-11-08T18:30:43Z",
  "published": "2024-06-19T15:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38544"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21b4c6d4d89030fd4657a8e7c8110fd941049794"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c91fb72a2ca6480d8d77262eef52dc5b178463a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de5a059e36657442b5637cc16df5163e435b9cb4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0e14dd35d4242340c7346aac60c7ff8fbf87ffc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19"
    }
  ],
  "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:H",
      "type": "CVSS_V3"
    }
  ]
}


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