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CVE-2026-19938 Use-after-free of an ATT PDU buffer when signing an outgoing Bluetooth ATT Signed Write Command fails

🗓️ 12 Oct 2026 23:19:55Reported by zephyrType 
cvelist
 cvelist
🔗 www.cve.org👁 45 Views

Use-after-free in Bluetooth ATT Signed Write Command path leads to buffer corruption.

Related
Affected
Refs
[
  {
    "vendor": "zephyrproject",
    "product": "zephyr",
    "collectionURL": "https://github.com/zephyrproject-rtos/zephyr",
    "packageName": "zephyr",
    "defaultStatus": "unaffected",
    "programFiles": [
      "subsys/bluetooth/host/att.c"
    ],
    "programRoutines": [
      {
        "name": "bt_att_send"
      },
      {
        "name": "chan_send"
      },
      {
        "name": "process_queue"
      }
    ],
    "versions": [
      {
        "version": "2.3.0",
        "status": "affected",
        "lessThan": "4.5.0",
        "versionType": "semver"
      }
    ]
  }
]

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