{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-23270",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23270",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-18T17:54:43.803Z",
    "updatedAt": "2026-10-19T18:35:40.580Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks\n\nAs Paolo said earlier [1]:\n\n\"Since the blamed commit below, classify can return TC_ACT_CONSUMED while\nthe current skb being held by the defragmentation engine. As reported by\nGangMin Kim, if such packet is that may cause a UaF when the defrag engine\nlater on tries to tuch again such packet.\"\n\nact_ct was never meant to be used in the egress path, however some users\nare attaching it to egress today [2]. Attempting to reach a middle\nground, we noticed that, while most qdiscs are not handling\nTC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we\naddress the issue by only allowing act_ct to bind to clsact/ingress\nqdiscs and shared blocks. That way it's still possible to attach act_ct to\negress (albeit only with clsact).\n\n[1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/\n[2] https://lore.kernel.org/netdev/cc6bfb4a-4a2b-42d8-b9ce-7ef6644fb22b@ovn.org/",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "172ba7d46c202e679f3ccb10264c67416aaeb1c4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bc4e5bb529823a09f02dbe96169de679a9db26e0"
            },
            {
              "version": "0b5b831122fc3789fff75be433ba3e4dd7b779d4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fb3c380a54e33d1fd272cc342faa906d787d7ef1"
            },
            {
              "version": "73f7da5fd124f2cda9161e2e46114915e6e82e97",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5a110ddcc99bda77a28598b3555fe009eaab3828"
            },
            {
              "version": "3f14b377d01d8357eba032b4cabc8c1149b458b6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "524ce8b4ea8f64900b6c52b6a28df74f6bc0801e"
            },
            {
              "version": "3f14b377d01d8357eba032b4cabc8c1149b458b6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "380ad8b7c65ea7aa10ef2258297079ed5ac1f5b6"
            },
            {
              "version": "3f14b377d01d8357eba032b4cabc8c1149b458b6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9deda0fcda5c1f388c5e279541850b71a2ccfcf4"
            },
            {
              "version": "3f14b377d01d8357eba032b4cabc8c1149b458b6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "11cb63b0d1a0685e0831ae3c77223e002ef18189"
            },
            {
              "version": "f5346df0591d10bc948761ca854b1fae6d2ef441",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.148",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.203"
            },
            {
              "version": "6.1.75",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.167"
            },
            {
              "version": "6.6.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.130"
            },
            {
              "version": "6.7.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.8"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.167",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.130",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.77",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}