CVE-2022-49558 (GCVE-0-2022-49558)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:14 – Updated: 2026-05-23 15:22
VLAI
Title
netfilter: nf_tables: double hook unregistration in netns path
Summary
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] <TASK> [ 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
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b110391d1e806167254d3c7ae5d637191d913175 , < b09e6ccf0d12f9356e8e3508d3e3dce126298538 (git)
Affected: 0a0e5d47670b753d3dbf88f3c77a97a30864d9bd , < 3fac8ce48fa9fd61ee9056d3ed48b2edefca8b82 (git)
Affected: 767d1216bff82507c945e92fe719dff2083bb2f4 , < 9c413a8c8bb49cc16796371805ecb260e885bb2b (git)
Affected: 767d1216bff82507c945e92fe719dff2083bb2f4 , < a3940dcf552f2393d1e8f263b386593f98abe829 (git)
Affected: 767d1216bff82507c945e92fe719dff2083bb2f4 , < 86c0154f4c3a56c5db8b9dd09e3ce885382c2c19 (git)
Affected: 767d1216bff82507c945e92fe719dff2083bb2f4 , < f9a43007d3f7ba76d5e7f9421094f00f2ef202f8 (git)
Affected: 5.4.99 , < 5.4.262 (semver)
Affected: 5.10.17 , < 5.10.198 (semver)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.4.262 , ≤ 5.4.* (semver)
Unaffected: 5.10.198 , ≤ 5.10.* (semver)
Unaffected: 5.15.45 , ≤ 5.15.* (semver)
Unaffected: 5.17.13 , ≤ 5.17.* (semver)
Unaffected: 5.18.2 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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          "value": "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."
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        "shortName": "Linux"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49558\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:31.597\",\"lastModified\":\"2026-06-17T05:18:26.690\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: doble anulaci\u00f3n del registro de gancho en la ruta netns __nft_release_hooks() se llama desde la ruta de salida pre_netns, lo que anula el registro de los ganchos; luego, se activa el evento NETDEV_UNREGISTER, que anula el registro de los ganchos nuevamente. [ 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 Anule el registro y destruya el gancho netdev de netns pre_exit a trav\u00e9s de kfree_rcu para que la ruta NETDEV_UNREGISTER vea los ganchos no 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",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a3940dcf552f2393d1e8f263b386593f98abe829\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b09e6ccf0d12f9356e8e3508d3e3dce126298538\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f9a43007d3f7ba76d5e7f9421094f00f2ef202f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:11:21+00:00",
      "cve": "CVE-2022-49558",
      "id": "CVE-2022-49558",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: nf_tables: double hook unregistration in netns path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49558.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-28T23:51:01Z",
      "cve": "CVE-2022-49558",
      "id": "CVE-2022-49558",
      "initial_release_date": "2025-02-27T03:05:01Z",
      "product_status:known_affected": "55",
      "product_status:known_not_affected": "297",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49558",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49558.json",
      "version": "14"
    }
  }
}



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