Revert "xsk: Support redirect to any socket bound to the same umem"

{
  "id": "eca0ed5002dcd8d9a095fe35590315564f3792e79689e32e99e2cea5c48a84d6",
  "url": "https://osv.dev/vulnerability/CVE-2024-39293",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Revert \"xsk: Support redirect to any socket bound to the same umem\"",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Revert \"xsk: Support redirect to any socket bound to the same umem\" This reverts commit 2863d665ea41282379f108e4da6c8a2366ba66db. This patch introduced a potential kernel crash when multiple napi instances redirect to the same AF_XDP socket. By removing the queue_index check, it is possible for multiple napi instances to access the Rx ring at the same time, which will result in a corrupted ring state which can lead to a crash when flushing the rings in __xsk_flush(). This can happen when the linked list of sockets to flush gets corrupted by concurrent accesses. A quick and small fix is not possible, so let us revert this for now.",
    "evidence": "osv:CVE-2024-39293",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.9.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2024-39293",
      "aliases": [
        "CVE-2024-39293"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2863d665ea41282379f108e4da6c8a2366ba66db"
                },
                {
                  "fixed": "19cb40b1064566ea09538289bfcf5bc7ecb9b6f5"
                },
                {
                  "fixed": "7fcf26b315bbb728036da0862de6b335da83dff2"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39293.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
                },
                {
                  "fixed": "6.9.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39293.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.634039143Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/19cb40b1064566ea09538289bfcf5bc7ecb9b6f5",
        "https://git.kernel.org/stable/c/7fcf26b315bbb728036da0862de6b335da83dff2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39293.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-39293",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39293.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-39293",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499359,
  "published_at": "2024-06-25T14:22:39.55+00:00"
}