net: Maliciously fragmented IPv6 packets can prevent receiving/processing future incoming packets (zephyrproject-rtos Zephyr)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.49 % · percentile 42 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- zephyr
- NVD status
- Analyzed
Description
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.
Weaknesses (CWE)
- CWE-772 — Missing Release of Resource after Effective Lifetime
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | zephyr |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · vulnerabilities@zephyrproject.org (Secondary) |
European references
- ENISA EUVD · EUVD-2026-39478
- GCVE · GCVE-0-2026-13351
Affected configurations (NVD CPE)
cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*≤ 4.4.1
Affected products
| Product | Versions |
|---|---|
| zephyrproject-rtos · Zephyr | affected * < 3.7.2 ; affected 4.0.0 < 4.2.2 ; affected 4.3.0 < 4.3.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |