CVE-2026-15390
Publication date 29 September 2026
Last updated 6 October 2026
Ubuntu priority
Description
Das U-Boot with CONFIG_IP_DEFRAG=y parameter fails to clear IP reassembly state after delivering a complete datagram. An attacker who can deliver fragmented IP traffic can execute arbitrary code by sending duplicated last-fragment IP packets. This issue was fixed in commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa in version 2026.07.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| u-boot | 26.04 LTS resolute |
Fixed 2025.10-0ubuntu2.1
|
| 24.04 LTS noble |
Fixed 2025.10-0ubuntu0.24.04.3
|
|
| 22.04 LTS jammy |
Fixed 2022.01+dfsg-2ubuntu2.8
|
|
| 20.04 LTS focal |
Fixed 2021.01+dfsg-3ubuntu0~20.04.6+esm1
|
|
| 18.04 LTS bionic |
Fixed 2020.10+dfsg-1ubuntu0~18.04.3+esm1
|
|
| 16.04 LTS xenial |
Fixed 2016.01+dfsg1-2ubuntu5+esm1
|
|
| u-boot-nezha | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialSeverity score breakdown
CVSS version: CVSS v4.0
Base score
9.0 · Critical
Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
References
Related Ubuntu Security Notices (USN)
- USN-8884-1
- U-Boot vulnerabilities
- 6 October 2026