Vulnerability-Lookup

GHSA-4XQV-X9WJ-55P5

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31

Details

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

netfilter: nf_nat: unregister and release hooks on error

If nf_hook_entries_insert_raw() fails, the NAT hooks get never released, resulting in a memleak.

Postpone setting nat_proto_net->nat_hook_ops when the hooks are registered to simplify the error path to decide whether the nat hooks need unwinding.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-98321"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:24Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_nat: unregister and release hooks on error\n\nIf nf_hook_entries_insert_raw() fails, the NAT hooks get never released,\nresulting in a memleak.\n\nPostpone setting nat_proto_net-\u003enat_hook_ops when the hooks are\nregistered to simplify the error path to decide whether the nat hooks\nneed unwinding.",
  "id": "GHSA-4xqv-x9wj-55p5",
  "modified": "2026-10-06T09:31:35Z",
  "published": "2026-10-06T09:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98321"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79084567cd082fb4482e1ea457580e7d6504dd99"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbdd39ce42530a193c56beb206a3356cb6d01016"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df80342f4bfc023ad7d6703df5e27f583ff0cb8d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98321 (GCVE-0-2026-98321)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46

Title

netfilter: nf_nat: unregister and release hooks on error

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_nat: unregister and release hooks on error If nf_hook_entries_insert_raw() fails, the NAT hooks get never released, resulting in a memleak. Postpone setting nat_proto_net->nat_hook_ops when the hooks are registered to simplify the error path to decide whether the nat hooks need unwinding.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6664 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/79084567cd082fb44…
https://git.kernel.org/stable/c/df80342f4bfc023ad…
https://git.kernel.org/stable/c/cbdd39ce42530a193…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1cd472bf036ca038e783ef5f058f54e45b7e8180 , < 79084567cd082fb4482e1ea457580e7d6504dd99 (git) Affected: 1cd472bf036ca038e783ef5f058f54e45b7e8180 , < df80342f4bfc023ad7d6703df5e27f583ff0cb8d (git) Affected: 1cd472bf036ca038e783ef5f058f54e45b7e8180 , < cbdd39ce42530a193c56beb206a3356cb6d01016 (git)
Linux	Linux	Affected: 4.18 Unaffected: 0 , < 4.18 (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_nat_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "79084567cd082fb4482e1ea457580e7d6504dd99",
              "status": "affected",
              "version": "1cd472bf036ca038e783ef5f058f54e45b7e8180",
              "versionType": "git"
            },
            {
              "lessThan": "df80342f4bfc023ad7d6703df5e27f583ff0cb8d",
              "status": "affected",
              "version": "1cd472bf036ca038e783ef5f058f54e45b7e8180",
              "versionType": "git"
            },
            {
              "lessThan": "cbdd39ce42530a193c56beb206a3356cb6d01016",
              "status": "affected",
              "version": "1cd472bf036ca038e783ef5f058f54e45b7e8180",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_nat_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.54",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc4",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_nat: unregister and release hooks on error\n\nIf nf_hook_entries_insert_raw() fails, the NAT hooks get never released,\nresulting in a memleak.\n\nPostpone setting nat_proto_net-\u003enat_hook_ops when the hooks are\nregistered to simplify the error path to decide whether the nat hooks\nneed unwinding."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:46:15.546Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/79084567cd082fb4482e1ea457580e7d6504dd99"
        },
        {
          "url": "https://git.kernel.org/stable/c/df80342f4bfc023ad7d6703df5e27f583ff0cb8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/cbdd39ce42530a193c56beb206a3356cb6d01016"
        }
      ],
      "title": "netfilter: nf_nat: unregister and release hooks on error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98321",
    "datePublished": "2026-10-06T08:46:15.546Z",
    "dateReserved": "2026-09-25T10:25:14.340Z",
    "dateUpdated": "2026-10-06T08:46:15.546Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.

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.

Action not permitted