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CVE-2025-40186

🗓️ 12 Nov 2025 21:56:29Reported by LinuxType 
cve
 cve
🔗 web.nvd.nist.gov👁 80 Views

Remove reqsk_fastopen_remove() from tcp_conn_request to prevent refcount underflow.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
nessus
Tenable Nessus
Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1253)
28 Oct 202500:00
–nessus
nessus
Tenable Nessus
Rocky Linux 8.6 [CIQ] Security Update: bpftool / bpftool-debuginfo / kernel / kernel-abi-stablelists / etc Multiple Vulnerabilities (ciqsa-2026_1190)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.2 [CIQ] Security Update: bpftool / kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (ciqsa-2026_0394)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.2 [CIQ] Security Update: bpftool / kernel / kernel-abi-stablelists / kernel-core / etc Multiple Vulnerabilities (ciqsa-2026_0620)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.2 [CIQ] Security Update: bpftool-debuginfo Multiple Vulnerabilities (ciqsa-2026_1262)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.2 [CIQ] Security Update: bpftool-debuginfo Multiple Vulnerabilities (ciqsa-2026_1274)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.4 [CIQ] Security Update: bpftool / kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (ciqsa-2026_0519)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.4 [CIQ] Security Update: kernel-rt-debug-debuginfo / kernel-rt-debuginfo Multiple Vulnerabilities (ciqsa-2026_1268)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.4 [CIQ] Security Update: bpftool-debuginfo Multiple Vulnerabilities (ciqsa-2026_1269)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus
Rocky Linux 9.6 [CIQ] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (ciqsa-2026_1178)
1 Oct 202600:00
–nessus
Rows per page
Vulners
CNA
Node
OR
OR
linuxlinux_kernelRange5.4.300–5.4.301
linuxlinux_kernelRange5.10.245–5.10.246
linuxlinux_kernelRange5.15.194–5.15.195
linuxlinux_kernelRange6.1.154–6.1.157
linuxlinux_kernelRange6.6.108–6.6.113
linuxlinux_kernelRange6.12.49–6.12.54
linuxlinux_kernelRange6.16.9–6.17
OR
linuxlinux_kernelRange6.17–5.4.301
linuxlinux_kernelRange5.5.0–5.10.246
linuxlinux_kernelRange5.11.0–5.15.195
linuxlinux_kernelRange5.16.0–6.1.157
linuxlinux_kernelRange6.2.0–6.6.113
linuxlinux_kernelRange6.7.0–6.12.54
linuxlinux_kernelRange6.13.0–6.17.4
linuxlinux_kernelRange6.18.0≥
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/tcp_input.c"
    ],
    "versions": [
      {
        "version": "7ec092a91ff351dcde89c23e795b73a328274db6",
        "lessThan": "e359b742eac1eac75cff4e38ee2e8cea492acd9b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a4378dedd6e07e62f2fccb17d78c9665718763d0",
        "lessThan": "ff6a8883f96a5bc74241ce5b3d431a6dcfa2124d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "33a4fdf0b4a25f8ce65380c3b0136b407ca57609",
        "lessThan": "eb85ad5f23268d64b037bfb545cbcba3752f90c7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "17d699727577814198d744d6afe54735c6b54c99",
        "lessThan": "643a94b0cf767325e953591c212be2eb826b9d7f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "dfd06131107e7b699ef1e2a24ed2f7d17c917753",
        "lessThan": "422c1c173c39bbbae1e0eaaf8aefe40b2596233b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fa4749c065644af4db496b338452a69a3e5147d9",
        "lessThan": "c11ace909e873118295e9eb22dc8c58b0b50eb32",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "45c8a6cc2bcd780e634a6ba8e46bffbdf1fc5c01",
        "lessThan": "64dc47a13aa3d9daf7cec29b44dca8e22a6aea15",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "45c8a6cc2bcd780e634a6ba8e46bffbdf1fc5c01",
        "lessThan": "2e7cbbbe3d61c63606994b7ff73c72537afe2e1c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ae313d14b45eca7a6bb29cb9bf396d977e7d28fb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.4.300",
        "lessThan": "5.4.301",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.10.245",
        "lessThan": "5.10.246",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.15.194",
        "lessThan": "5.15.195",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.1.154",
        "lessThan": "6.1.157",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.6.108",
        "lessThan": "6.6.113",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.49",
        "lessThan": "6.12.54",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.16.9",
        "lessThan": "6.17",
        "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/ipv4/tcp_input.c"
    ],
    "versions": [
      {
        "version": "6.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.4.301",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.246",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.195",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.157",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.113",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.54",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17.4",
        "lessThanOrEqual": "6.17.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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15 Oct 2026 22:19Current
6.3Medium risk
Vulners AI Score6.3
CVSS 3.18.1
EPSS0.0058
80