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

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46
VLAI
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 6666 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1cd472bf036ca038e783ef5f058f54e45b7e8180 , < 79084567cd082fb4482e1ea457580e7d6504dd99 (git)
Affected: 1cd472bf036ca038e783ef5f058f54e45b7e8180 , < df80342f4bfc023ad7d6703df5e27f583ff0cb8d (git)
Affected: 1cd472bf036ca038e783ef5f058f54e45b7e8180 , < cbdd39ce42530a193c56beb206a3356cb6d01016 (git)
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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)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_nat_core.c"
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              "operator": "OR"
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      "descriptions": [
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          "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"
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        },
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          "url": "https://git.kernel.org/stable/c/cbdd39ce42530a193c56beb206a3356cb6d01016"
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      "title": "netfilter: nf_nat: unregister and release hooks on error",
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  "cveMetadata": {
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    "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"
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                "programFiles": [
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                ],
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        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-98321",
        "lastModified": "2026-10-06T09:18:24.117",
        "metrics": {},
        "published": "2026-10-06T09:18:24.117",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "current_release_date": "2026-10-10T06:48:20+00:00",
      "cve": "CVE-2026-98321",
      "id": "CVE-2026-98321",
      "initial_release_date": "2026-10-06T00:00:00+00:00",
      "product_status:known_affected": "235",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: nf_nat: unregister and release hooks on error",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98321.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-10-07T00:00:42Z",
      "cve": "CVE-2026-98321",
      "id": "CVE-2026-98321",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98321",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98321.json",
      "version": "2"
    }
  }
}



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