net: fix UAF issue in nfqnl_nf_hook_drop() when ops_init() failed

{
  "id": "94825edf5cabb13080fd9cf08c9479b69a6e5cc39baa990ab5fb5e3c3d6e55e6",
  "url": "https://osv.dev/vulnerability/CVE-2022-50780",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: fix UAF issue in nfqnl_nf_hook_drop() when ops_init() failed",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: fix UAF issue in nfqnl_nf_hook_drop() when ops_init() failed When the ops_init() interface is invoked to initialize the net, but ops->init() fails, data is released. However, the ptr pointer in net->gen is invalid. In this case, when nfqnl_nf_hook_drop() is invoked to release the net, invalid address access occurs. The process is as follows: setup_net() ops_init() data = kzalloc(...) ---> alloc \"data\" net_assign_generic() ---> assign \"date\" to ptr in net->gen ... ops->init() ---> failed ... kfree(data); ---> ptr in net->gen is invalid ... ops_exit_list() ... nfqnl_nf_hook_drop() *q = nfnl_queue_pernet(net) ---> q is invalid The following is the Call Trace information: BUG: KASAN: use-after-free in nfqnl_nf_hook_drop+0x264/0x280 Read of size 8 at addr ffff88810396b240 by task ip/15855 Call Trace: dump_stack_lvl+0x8e/0xd1 print_report+0x155/0x454 kasan_report+0xba/0x1f0 nfqnl_nf_hook_drop+0x264/0x280 nf_queue_nf_hook_drop+0x8b/0x1b0 __nf_unregister_net_hook+0x1ae/0x5a0 nf_unregister_net_hooks+0xde/0x130 ops_exit_list+0xb0/0x170 setup_net+0x7ac/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Allocated by task 15855: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0xa1/0xb0 __kmalloc+0x49/0xb0 ops_init+0xe7/0x410 setup",
    "evidence": "osv:CVE-2022-50780",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.19.264",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.223",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.153",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.77",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-50780",
      "aliases": [
        "CVE-2022-50780"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/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": [
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                {
                  "fixed": "97ad240fd9aa9214497d14af2b91608e20856cac"
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                {
                  "fixed": "c3edc6e808209aa705185f732e682a370981ced1"
                },
                {
                  "fixed": "a1e18acb0246bfb001b08b8b1b830b5ec92a0f13"
                },
                {
                  "fixed": "4a4df5e78712de39d6f90d6a64b5eb48dca03bd5"
                },
                {
                  "fixed": "d266935ac43d57586e311a087510fe6a084af742"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50780.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.33"
                },
                {
                  "fixed": "4.19.264"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "4.20.0"
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                {
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                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.153"
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            },
            {
              "type": "ECOSYSTEM",
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.0.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50780.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.168676065Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4a4df5e78712de39d6f90d6a64b5eb48dca03bd5",
        "https://git.kernel.org/stable/c/5a2ea549be94924364f6911227d99be86e8cf34a",
        "https://git.kernel.org/stable/c/97ad240fd9aa9214497d14af2b91608e20856cac",
        "https://git.kernel.org/stable/c/a1e18acb0246bfb001b08b8b1b830b5ec92a0f13",
        "https://git.kernel.org/stable/c/c3edc6e808209aa705185f732e682a370981ced1",
        "https://git.kernel.org/stable/c/d266935ac43d57586e311a087510fe6a084af742",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50780.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50780",
        "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/2022/50xxx/CVE-2022-50780.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50780",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510679,
  "published_at": "2025-12-24T13:06:08.552+00:00"
}