Vulnerability-Lookup

GHSA-J95H-GR5V-MG6J

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-19 15:31

Details

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

netfilter: nf_tables: do not allow SET_ID to refer to another table

When doing lookups for sets on the same batch by using its ID, a set from a different table can be used.

Then, when the table is removed, a reference to the set may be kept after the set is freed, leading to a potential use-after-free.

When looking for sets by ID, use the table that was used for the lookup by name, and only return sets belonging to that same table.

This fixes CVE-2022-2586, also reported as ZDI-CAN-17470.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50213"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: do not allow SET_ID to refer to another table\n\nWhen doing lookups for sets on the same batch by using its ID, a set from a\ndifferent table can be used.\n\nThen, when the table is removed, a reference to the set may be kept after\nthe set is freed, leading to a potential use-after-free.\n\nWhen looking for sets by ID, use the table that was used for the lookup by\nname, and only return sets belonging to that same table.\n\nThis fixes CVE-2022-2586, also reported as ZDI-CAN-17470.",
  "id": "GHSA-j95h-gr5v-mg6j",
  "modified": "2025-11-19T15:31:30Z",
  "published": "2025-06-18T12:30:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50213"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d07039397527361850c554c192e749cfc879ea9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a4b18b1ff11ba26f9a852019d674fde9d1d1cff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77d3b5038b7462318f5183e2ad704b01d57215a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f4fa03410f7c5f5bd8f90e9c11e9a8c4b526ff6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faafd9286f1355c76fe9ac3021c280297213330e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fab2f61cc3b0e441b1749f017cfee75f9bbaded7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50213 (GCVE-0-2022-50213)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:03 – Updated: 2026-08-05 08:57

Title

netfilter: nf_tables: do not allow SET_ID to refer to another table

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not allow SET_ID to refer to another table When doing lookups for sets on the same batch by using its ID, a set from a different table can be used. Then, when the table is removed, a reference to the set may be kept after the set is freed, leading to a potential use-after-free. When looking for sets by ID, use the table that was used for the lookup by name, and only return sets belonging to that same table. This fixes CVE-2022-2586, also reported as ZDI-CAN-17470.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

7 references

URL	Tags
https://git.kernel.org/stable/c/77d3b5038b7462318…
https://git.kernel.org/stable/c/fab2f61cc3b0e441b…
https://git.kernel.org/stable/c/1a4b18b1ff11ba26f…
https://git.kernel.org/stable/c/faafd9286f1355c76…
https://git.kernel.org/stable/c/f4fa03410f7c5f5bd…
https://git.kernel.org/stable/c/0d070393975273618…
https://git.kernel.org/stable/c/470ee20e069a6d05a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < 77d3b5038b7462318f5183e2ad704b01d57215a2 (git) Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < fab2f61cc3b0e441b1749f017cfee75f9bbaded7 (git) Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < 1a4b18b1ff11ba26f9a852019d674fde9d1d1cff (git) Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < faafd9286f1355c76fe9ac3021c280297213330e (git) Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < f4fa03410f7c5f5bd8f90e9c11e9a8c4b526ff6f (git) Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < 0d07039397527361850c554c192e749cfc879ea9 (git) Affected: 958bee14d0718ca7a5002c0f48a099d1d345812a , < 470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2 (git)
Linux	Linux	Affected: 3.16 Unaffected: 0 , < 3.16 (semver) Unaffected: 4.19.256 , ≤ 4.19.* (semver) Unaffected: 5.4.211 , ≤ 5.4.* (semver) Unaffected: 5.10.137 , ≤ 5.10.* (semver) Unaffected: 5.15.61 , ≤ 5.15.* (semver) Unaffected: 5.18.18 , ≤ 5.18.* (semver) Unaffected: 5.19.2 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_tables_api.c"
          ],
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          "versions": [
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              "version": "958bee14d0718ca7a5002c0f48a099d1d345812a",
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            },
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              "versionType": "git"
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              "version": "958bee14d0718ca7a5002c0f48a099d1d345812a",
              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
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            },
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.4.211",
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              "status": "unaffected",
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              "versionType": "semver"
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              "version": "5.15.61",
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              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
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      "cpeApplicability": [
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              "cpeMatch": [
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        }
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            "baseSeverity": "HIGH",
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              "value": "AV:L - The bug is reached only through the NETLINK_NETFILTER nftables API (batch NEWSET/NEWSETELEM/DELTABLE), which requires local process access; netfilter/nftables netlink is scored Local per kernel guidance.\nAC:L - The attacker fully controls the netlink batch that creates a cross-table SET_ID reference and deletes the owning table, so the UAF is reliably triggerable with no conditions outside attacker control; public exploits confirm this.\nPR:L - nfnetlink requires CAP_NET_ADMIN via netlink_net_capable(), but that capability is available in an unprivileged user+network namespace (unshare -Urn), so Privileges Required is Low, not High.\nUI:N - Exploitation is entirely attacker-driven through crafted nftables netlink messages; no victim action is required.\nS:U - Impact is standard host kernel privilege escalation within the same OS security authority; it does not cross a VM, IOMMU, or other security boundary, so Scope remains Unchanged.\nC:H - The UAF of nft_object enables controlled reuse and arbitrary kernel reads (including KASLR leaks via obj-\u003ekey.name), so Confidentiality is High per UAF guidance.\nI:H - Freed nft_object reuse allows hijacking obj-\u003eops-\u003eeval for RIP control and arbitrary code execution/LPE (demonstrated publicly), so Integrity is High.\nA:H - The dangling object/set reference causes kernel use-after-free crashes (KASAN/oops) even without full exploitation, so Availability is High."
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        {
          "url": "https://git.kernel.org/stable/c/470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2"
        }
      ],
      "title": "netfilter: nf_tables: do not allow SET_ID to refer to another table",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50213",
    "datePublished": "2025-06-18T11:03:50.958Z",
    "dateReserved": "2025-06-18T10:57:27.429Z",
    "dateUpdated": "2026-08-05T08:57:42.866Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-J95H-GR5V-MG6J

CVE-2022-50213 (GCVE-0-2022-50213)

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