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
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)
Create a notification for this product.
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)
Create a notification for this product.
Show details on NVD website
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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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            "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 registrados."
          }
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        "id": "CVE-2022-49558",
        "lastModified": "2026-06-17T05:18:26.690",
        "metrics": {
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                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
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        "published": "2025-02-26T07:01:31.597",
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            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "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": "2026-10-16T14:20:45Z",
      "cve": "CVE-2022-49558",
      "id": "CVE-2022-49558",
      "initial_release_date": "2025-02-27T03:05:01Z",
      "product_status:known_affected": "61",
      "product_status:known_not_affected": "401",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49558",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2022-49558.json",
      "version": "16"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.