net: Maliciously fragmented IPv6 packets can prevent receiving/processing future incoming packets
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.
CVE-2026-13351
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-13351
Zephyr
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/zephyrproject-rtos/zephyr",
"vendor": "zephyrproject-rtos",
"product": "Zephyr",
"versions": [
{
"status": "affected",
"version": "*",
"lessThan": "3.7.2",
"versionType": "git"
},
{
"status": "affected",
"version": "4.0.0",
"lessThan": "4.2.2",
"versionType": "git"
},
{
"status": "affected",
"version": "4.3.0",
"lessThan": "4.3.1",
"versionType": "git"
}
],
"packageName": "Zephyr",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-13351
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32268 · Revision 1
- Added to Heist Feed
- Publisher date