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CVE-2026-72057 net/sched: act_ct: preserve tc_skb_cb across defragmentation

🗓️ 15 Aug 2026 05:52:12Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 24 Views

act_ct in net/sched loses tc_skb_cb during defragmentation, triggering WARN_ON_ONCE when panic_on_warn is enabled.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/sched/act_ct.c"
    ],
    "versions": [
      {
        "version": "0d76daf2013ce1da20eab5e26bd81d983e1c18fb",
        "lessThan": "fb080b6f54835d5d4d11ce3122800e6f0f6689e6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec624fe740b416fb68d536b37fb8eef46f90b5c2",
        "lessThan": "67d6b00a54446c008f52cf70fc0c2ad0c712f85d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec624fe740b416fb68d536b37fb8eef46f90b5c2",
        "lessThan": "2400c4b05d58834b994500a9eec90a37db44187c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec624fe740b416fb68d536b37fb8eef46f90b5c2",
        "lessThan": "5c3ae5f6c7c6de73ea9b6a75154fe4ed343e1bac",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec624fe740b416fb68d536b37fb8eef46f90b5c2",
        "lessThan": "b3d835407846134b0d54637c0281b39bebef831d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec624fe740b416fb68d536b37fb8eef46f90b5c2",
        "lessThan": "f7f45ceb855d9ba1cba594fb3f383255f7013fad",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec624fe740b416fb68d536b37fb8eef46f90b5c2",
        "lessThan": "9092e15defbe6c7bc241c306093ca9d358a578e7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.15.13",
        "lessThan": "5.15.217",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/sched/act_ct.c"
    ],
    "versions": [
      {
        "version": "5.16",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.16",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.217",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.184",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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23 Aug 2026 12:46Current
CVSS 3.18.2
EPSS0.00585
24