CVE-2026-64032

🗓️ 19 Jul 2026 15:39:22Reported by LinuxType

Fix use-after-free when removing a bridge port due to conflict between per-port and per-VLAN multicast contexts.

Reporter	Title	Published	Views	Family All 7
Cvelist	CVE-2026-64032 bridge: mcast: Fix a possible use-after-free when removing a bridge port	19 Jul 202615:39	–	cvelist
EUVD	EUVD-2026-45605	19 Jul 202615:39	–	euvd
NVD	CVE-2026-64032	19 Jul 202616:17	–	nvd
OSV	CVE-2026-64032 bridge: mcast: Fix a possible use-after-free when removing a bridge port	19 Jul 202615:39	–	osv
OSV	DEBIAN-CVE-2026-64032	19 Jul 202616:17	–	osv
OSV	UBUNTU-CVE-2026-64032	20 Jul 202600:00	–	osv
Positive Technologies	PT-2026-61349	19 Jul 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange5.15.186–5.15.209

linux linux_kernelRange6.1.142–6.1.175

linux linux_kernelRange6.6.95–6.6.142

linux linux_kernelRange6.12.35–6.12.92

linux linux_kernelRange6.15.4–6.16

linux linux_kernelRange6.16–5.15.209

linux linux_kernelRange5.16.0–6.1.175

linux linux_kernelRange6.2.0–6.6.142

linux linux_kernelRange6.7.0–6.12.92

linux linux_kernelRange6.13.0–6.18.34

linux linux_kernelRange6.19.0–7.0.11

linux linux_kernelRange7.1.0≥

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/bridge/br_multicast.c"
    ],
    "versions": [
      {
        "version": "410a033bfa8c7daefbae0225c836693db2149ec1",
        "lessThan": "ddefd1b8e5eb58933a697ab38334f0fd82e7fb8b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c6d16eab122744df698f18b47cf771945cd55066",
        "lessThan": "ed3b69e60385a03df11c6d12e5d7bdf0f4a11b70",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b4c83b37490d61cfdd62a2b29e98a9b89004b5c0",
        "lessThan": "1900ca8acb92fbea8bf9abef9927c7fed03db7fc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "78f768e36c065ca3f88272fcf39014782c2d4ecd",
        "lessThan": "ebe5561154c823b323bd06e350b55e0b8604d851",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b30ae9adb047dd0a7982975ec3933c529537026",
        "lessThan": "a9224862d597d0eed0a34bbb27343f703fc4113f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b30ae9adb047dd0a7982975ec3933c529537026",
        "lessThan": "7213256c91ed778a0997c2029c152b18dc50e4fd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b30ae9adb047dd0a7982975ec3933c529537026",
        "lessThan": "4df78ff02629c7729168f0696a7a2123c389818d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c996e25df0b3282c724bb5aca434518bc08cd963",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.15.186",
        "lessThan": "5.15.209",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.1.142",
        "lessThan": "6.1.175",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.6.95",
        "lessThan": "6.6.142",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.35",
        "lessThan": "6.12.92",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.15.4",
        "lessThan": "6.16",
        "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/bridge/br_multicast.c"
    ],
    "versions": [
      {
        "version": "6.16",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.16",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.209",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.175",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.142",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.92",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.34",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.11",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/a9224862d597d0eed0a34bbb27343f703fc4113f
git	www.git.kernel.org/stable/c/ed3b69e60385a03df11c6d12e5d7bdf0f4a11b70
git	www.git.kernel.org/stable/c/7213256c91ed778a0997c2029c152b18dc50e4fd
git	www.git.kernel.org/stable/c/ddefd1b8e5eb58933a697ab38334f0fd82e7fb8b
git	www.git.kernel.org/stable/c/ebe5561154c823b323bd06e350b55e0b8604d851
git	www.git.kernel.org/stable/c/1900ca8acb92fbea8bf9abef9927c7fed03db7fc
git	www.git.kernel.org/stable/c/4df78ff02629c7729168f0696a7a2123c389818d

20 Jul 2026 15:17Current

5.4Medium risk

Vulners AI Score5.4

CVSS 3.17.8