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EUVD-2026-40367

🗓️ 30 Jun 2026 16:20:16Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 3 Views

Non-atomic net_buf refcounts can cause double free and use-after-free in SMP; fixed by atomic refcounts; affects Zephyr up to v4.4.0.

Related
Affected
Refs
[
  {
    "enisaIdVendor": [
      {
        "id": "cc103dd0-f7cc-3fa7-86ae-9e790b3b2885",
        "vendor": {
          "name": "zephyrproject"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "1b1f6228-8e1b-38ba-9452-935aeb024883",
        "product": {
          "name": "Zephyr",
          "vendor": {
            "name": "zephyrproject-rtos"
          }
        },
        "product_version": "2.7.0 <4.5.0"
      }
    ]
  }
]

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30 Jun 2026 16:41Current
6Medium risk
Vulners AI Score6
CVSS 3.16.4
SSVC
3