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CVE-2026-43020 Bluetooth: MGMT: validate LTK enc_size on load

🗓️ 01 May 2026 14:15:23Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 26 Views

Bluetooth MGMT validates LTK enc_size on load to prevent stack overflow in the Linux kernel.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/bluetooth/mgmt.c"
    ],
    "versions": [
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "0f37d1e65c6d71ad94ccfb5c602163c525db789d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "257cdb960d8ff6d60bb6461b03c814b6cf0c9e64",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "c34577f517b556fb6ca173d45bf7e766ae2564ce",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "f71695e81f4cb428f3c7e2138eae88199005b52c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "82f342b3b006ca1d65f4890c05f2ec32fcb808b6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "346af67b8d116f01ef696fd47959a55deb2db8b6",
        "lessThan": "b8dbe9648d69059cfe3a28917bfbf7e61efd7f15",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/bluetooth/mgmt.c"
    ],
    "versions": [
      {
        "version": "3.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.4",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.253",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.203",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.168",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.134",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.81",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.22",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.12",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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