High
net: Maliciously fragmented IPv6 packets can prevent receiving/processing future incoming packets
Type: advisorySources: OSV
Zephyr's IPv6 network stack can be prevented from receiving or processing future incoming packets by sending a small number of maliciously fragmented IPv6 packets. When such a packet is handled by the fragment-header processing path, the associated RX network packet buffer (allocated from a memory slab) is not released back to the pool. Repeating the malicious packet exhausts all RX buffer slots, after which the device can no longer obtain RX buffers and stops receiving traffic, resulting in a denial of service.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-13351
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 21:16 UTC · Revision 1
Source evidence
net: Maliciously fragmented IPv6 packets can prevent receiving/processing future incoming packets
core-osv · Original sourcePublished 25 Jun 2026, 16:27 UTC
Zephyr's IPv6 network stack can be prevented from receiving or processing future incoming packets by sending a small number of maliciously fragmented IPv6 packets. When such a packet is handled by the fragment-header processing path, the associated RX network packet buffer (allocated from a memory slab) is not released back to the pool. Repeating the malicious packet exhausts all RX buffer slots, after which the device can no longer obtain RX buffers and stops receiving traffic, resulting in a denial of service.
osv:CVE-2026-13351
Complete source record
{
"id": "480de8ea5b3dd89f2007ffaa0ddca845c04313c48db28d7f9fedeb61077a1e27",
"url": "https://osv.dev/vulnerability/CVE-2026-13351",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "net: Maliciously fragmented IPv6 packets can prevent receiving/processing future incoming packets",
"summary": "Zephyr's IPv6 network stack can be prevented from receiving or processing future incoming packets by sending a small number of maliciously fragmented IPv6 packets. When such a packet is handled by the fragment-header processing path, the associated RX network packet buffer (allocated from a memory slab) is not released back to the pool. Repeating the malicious packet exhausts all RX buffer slots, after which the device can no longer obtain RX buffers and stops receiving traffic, resulting in a denial of service.",
"evidence": "osv:CVE-2026-13351",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-13351",
"aliases": [
"CVE-2026-13351",
"GHSA-cv4q-2j56-4wqf"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/zephyrproject-rtos/zephyr",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "bbbf8b30094dacd0d6830946ba206bcec8af6b0c"
},
{
"introduced": "8469084dfae85f854555f0607f2c838dad097235"
},
{
"fixed": "dbb536326e611dc8e97cc6a322d379ba9cac1ab7"
},
{
"introduced": "3568e1b6d5cdd51a6b964a2a1d6d29200fea2056"
},
{
"fixed": "75f67d766726351b30199f9a2bf55803d717a3be"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "*"
},
{
"fixed": "3.7.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.2.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "4.3.0"
},
{
"fixed": "4.3.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
}
],
"versions": [
"v4.3.1-rc1",
"v3.7.2-rc2",
"v4.3.0",
"v4.2.1",
"v4.2.0",
"v4.2.0-rc3",
"v4.2.0-rc2",
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"v3.7.0-rc2",
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"v3.6.0",
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"v3.6.0-rc1",
"zephyr-v3.5.0",
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"v3.5.0-rc2",
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"zephyr-v3.4.0",
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"zephyr-v3.2.0",
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"v3.2.0-rc3",
"v3.2.0-rc2",
"v3.2.0-rc1",
"zephyr-v3.1.0",
"v3.1.0",
"v3.1.0-rc3",
"v3.1.0-rc2",
"v3.1.0-rc1",
"zephyr-v3.0.0",
"v3.0.0",
"v3.0.0-rc3",
"v3.0.0-rc2",
"v3.0.0-rc1",
"v2.7.99",
"v2.7.0-rc3",
"v2.7.0-rc2",
"v2.7.0-rc1",
"zephyr-v2.6.0",
"v2.6.0",
"v2.6.0-rc3",
"v2.6.0-rc2",
"v2.6.0-rc1",
"zephyr-v2.5.0",
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"v2.5.0-rc3",
"v2.5.0-rc2",
"v2.5.0-rc1",
"zephyr-v2.4.0",
"v2.4.0",
"v2.4.0-rc3",
"v2.4.0-rc2",
"v2.4.0-rc1",
"zephyr-v2.3.0",
"v2.3.0",
"v2.3.0-rc2",
"v2.3.0-rc1",
"zephyr-v2.1.0",
"v2.1.0",
"zephyr-v2.2.0",
"v2.2.0",
"v2.2.0-rc3",
"v2.2.0-rc2",
"v2.2.0-rc1",
"v2.1.0-rc3",
"v2.1.0-rc2",
"v2.1.0-rc1",
"zephyr-v2.0.0",
"v2.0.0",
"v2.0.0-rc3",
"v2.0.0-rc2",
"v2.0.0-rc1",
"zephyr-v1.14.0",
"v1.14.0",
"v1.14.0-rc3",
"v1.14.0-rc2",
"v1.14.0-rc1",
"zephyr-v1.13.0",
"v1.13.0",
"v1.13.0-rc3",
"v1.13.0-rc2",
"v1.13.0-rc1",
"zephyr-v1.12.0",
"v1.12.0",
"v1.12.0-rc3",
"v1.12.0-rc2",
"v1.12.0-rc1",
"zephyr-v1.11.0",
"v1.11.0",
"v1.11.0-rc3",
"v1.11.0-rc2",
"v1.11.0-rc1",
"zephyr-v1.10.0",
"v1.10.0",
"v1.10.0-rc3",
"v1.10.0-rc2",
"v1.10.0-rc1",
"zephyr-v1.9.0",
"v1.9.0",
"v1.9.0-rc4",
"v1.9.0-rc3",
"v1.9.0-rc2",
"v1.9.0-rc1",
"v1.8.99",
"zephyr-v1.5.0",
"v1.5.0",
"v1.7.99",
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"v1.5.0-rc4",
"v1.5.0-rc3",
"v1.5.0-rc2",
"v1.5.0-rc1",
"v1.5.0-rc0",
"zephyr-v1.4.0",
"v1.4.0",
"v1.4.0-rc3",
"v1.4.0-rc2",
"v1.4.0-rc1",
"zephyr-v1.3.0",
"v1.3.0",
"v1.3.0-rc2",
"v1.3.0-rc1",
"zephyr-v1.2.0",
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"v1.2.0-rc2",
"v1.2.0-rc1",
"zephyr-v1.1.0",
"v1.1.0",
"v1.1.0-rc1",
"zephyr-v1.0.0",
"v1.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-13351.json"
}
}
],
"modified": "2026-10-28T02:30:23.453955093Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13351.json",
"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-cv4q-2j56-4wqf",
"https://nvd.nist.gov/vuln/detail/CVE-2026-13351",
"https://github.com/zephyrproject-rtos/zephyr"
],
"provider_metadata": {
"cwe_ids": [
"CWE-772"
],
"cna_assigner": "zephyr",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13351.json"
}
},
"related_cves": [
{
"value": "CVE-2026-13351",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 490137,
"published_at": "2026-06-25T16:27:17.917+00:00"
}