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CVE-2026-16515 ICMPv6 error messages sent for multicast-destined packets and non-unique source addresses enable network amplification in Zephyr's IPv6 stack

🗓️ 18 Sep 2026 14:30:13Reported by zephyrType 
cvelist
 cvelist
🔗 www.cve.org👁 14 Views

net_icmpv6_send_error() in subsys/net/ip/icmpv6.c implemented only one of the three RFC 4443 section 2.4 suppression rules (do not answer an ICMPv6 error with an ICMPv6 error). It did not check whether the triggering packet's source address identi...

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Affected
Refs
[
  {
    "vendor": "zephyrproject",
    "product": "zephyr",
    "collectionURL": "https://github.com/zephyrproject-rtos/zephyr",
    "packageName": "zephyr",
    "defaultStatus": "unaffected",
    "programFiles": [
      "subsys/net/ip/icmpv6.c"
    ],
    "programRoutines": [
      {
        "name": "net_icmpv6_send_error"
      }
    ],
    "versions": [
      {
        "version": "1.14.0",
        "status": "affected",
        "versionType": "semver",
        "lessThan": "4.4.2"
      }
    ]
  }
]

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18 Sep 2026 14:30Current
CVSS 3.14.7
14