CVE-2026-64078 (GCVE-0-2026-64078)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-20 13:43
VLAI
Title
netfilter: x_tables: add and use xtables_unregister_table_exit
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: add and use xtables_unregister_table_exit Previous change added xtables_unregister_table_pre_exit to detach the table from the packetpath and to unlink it from the active table list. In case of rmmod, userspace that is doing set/getsockopt for this table will not be able to re-instantiate the table: 1. The larval table has been removed already 2. existing instantiated table is no longer on the xt pernet table list. This adds the second stage helper: unlink the table from the dying list, free the hook ops (if any) and do the audit notification. It replaces xt_unregister_table().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 , < 86ee5bc9c0f0e652e19f395675a432de11b75514 (git)
Affected: fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 , < 8026e5163cca1d1db436c7bfb89ddea8b5e8c2cf (git)
Affected: fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 , < b4597d5fd7d2f8cebfffd40dffb5e003cc78964c (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/netfilter/x_tables.h",
            "net/ipv4/netfilter/arp_tables.c",
            "net/ipv4/netfilter/ip_tables.c",
            "net/ipv4/netfilter/iptable_nat.c",
            "net/ipv6/netfilter/ip6_tables.c",
            "net/ipv6/netfilter/ip6table_nat.c",
            "net/netfilter/x_tables.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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            "net/ipv4/netfilter/arp_tables.c",
            "net/ipv4/netfilter/ip_tables.c",
            "net/ipv4/netfilter/iptable_nat.c",
            "net/ipv6/netfilter/ip6_tables.c",
            "net/ipv6/netfilter/ip6table_nat.c",
            "net/netfilter/x_tables.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "version": "0",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
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                  "vulnerable": true
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                  "versionStartIncluding": "5.15",
                  "vulnerable": true
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              "negate": false,
              "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: x_tables: add and use xtables_unregister_table_exit\n\nPrevious change added xtables_unregister_table_pre_exit to detach the\ntable from the packetpath and to unlink it from the active table list.\nIn case of rmmod, userspace that is doing set/getsockopt for this table\nwill not be able to re-instantiate the table:\n 1. The larval table has been removed already\n 2. existing instantiated table is no longer on the xt pernet table list.\n\nThis adds the second stage helper:\n\nunlink the table from the dying list, free the hook ops (if any) and do\nthe audit notification.  It replaces xt_unregister_table()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      ],
      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/b4597d5fd7d2f8cebfffd40dffb5e003cc78964c"
        }
      ],
      "title": "netfilter: x_tables: add and use xtables_unregister_table_exit",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64078",
    "datePublished": "2026-07-19T15:39:51.582Z",
    "dateReserved": "2026-07-19T07:54:57.031Z",
    "dateUpdated": "2026-07-20T13:43:05.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64078",
      "date": "2026-07-21",
      "epss": "0.00127",
      "percentile": "0.02741"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-21T01:02:56.000Z",
      "cve": "CVE-2026-64078",
      "id": "msrc_CVE-2026-64078",
      "initial_release_date": "2026-07-21T01:02:56.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "netfilter: x_tables: add and use xtables_unregister_table_exit",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64078.json",
      "version": "1"
    },
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-21T09:07:48+00:00",
      "cve": "CVE-2026-64078",
      "id": "CVE-2026-64078",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "185",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: x_tables: add and use xtables_unregister_table_exit",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64078.json",
      "version": "3"
    }
  }
}



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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.

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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.


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