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GHSA-R85C-395R-G559

Vulnerability from github – Published: 2025-06-19 15:30 – Updated: 2025-10-22 18:30
VLAI
Details

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

netfilter: nf_tables: double hook unregistration in netns path

__nft_release_hooks() is called from pre_netns exit path which unregisters the hooks, then the NETDEV_UNREGISTER event is triggered which unregisters the hooks again.

[ 565.221461] WARNING: CPU: 18 PID: 193 at net/netfilter/core.c:495 __nf_unregister_net_hook+0x247/0x270 [...] [ 565.246890] CPU: 18 PID: 193 Comm: kworker/u64:1 Tainted: G E 5.18.0-rc7+ #27 [ 565.253682] Workqueue: netns cleanup_net [ 565.257059] RIP: 0010:__nf_unregister_net_hook+0x247/0x270 [...] [ 565.297120] Call Trace: [ 565.300900] [ 565.304683] nf_tables_flowtable_event+0x16a/0x220 [nf_tables] [ 565.308518] raw_notifier_call_chain+0x63/0x80 [ 565.312386] unregister_netdevice_many+0x54f/0xb50

Unregister and destroy netdev hook from netns pre_exit via kfree_rcu so the NETDEV_UNREGISTER path see unregistered hooks.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-49558"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:31Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: double hook unregistration in netns path\n\n__nft_release_hooks() is called from pre_netns exit path which\nunregisters the hooks, then the NETDEV_UNREGISTER event is triggered\nwhich unregisters the hooks again.\n\n[  565.221461] WARNING: CPU: 18 PID: 193 at net/netfilter/core.c:495 __nf_unregister_net_hook+0x247/0x270\n[...]\n[  565.246890] CPU: 18 PID: 193 Comm: kworker/u64:1 Tainted: G            E     5.18.0-rc7+ #27\n[  565.253682] Workqueue: netns cleanup_net\n[  565.257059] RIP: 0010:__nf_unregister_net_hook+0x247/0x270\n[...]\n[  565.297120] Call Trace:\n[  565.300900]  \u003cTASK\u003e\n[  565.304683]  nf_tables_flowtable_event+0x16a/0x220 [nf_tables]\n[  565.308518]  raw_notifier_call_chain+0x63/0x80\n[  565.312386]  unregister_netdevice_many+0x54f/0xb50\n\nUnregister and destroy netdev hook from netns pre_exit via kfree_rcu\nso the NETDEV_UNREGISTER path see unregistered hooks.",
  "id": "GHSA-r85c-395r-g559",
  "modified": "2025-10-22T18:30:32Z",
  "published": "2025-06-19T15:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49558"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3fac8ce48fa9fd61ee9056d3ed48b2edefca8b82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86c0154f4c3a56c5db8b9dd09e3ce885382c2c19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c413a8c8bb49cc16796371805ecb260e885bb2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3940dcf552f2393d1e8f263b386593f98abe829"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b09e6ccf0d12f9356e8e3508d3e3dce126298538"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9a43007d3f7ba76d5e7f9421094f00f2ef202f8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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