Name: CVE-2026-15390: Out-of-bounds Write
Creator: Rapid7
Published: 2026-09-29T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-15390, CWE-787, CWE-459, CVSS 9, EPSS 0.00286

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.

CVSS Details

CVSS 4.0 Base Score: 9 (CRITICAL)
CVSS 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Ubuntu	—	Upgrade u-boot-tools (Ubuntu Pro)Upgrade u-boot-imxUpgrade u-boot-qemuUpgrade u-boot-toolsUpgrade u-boot-qemu (Ubuntu Pro)Upgrade u-boot-imx (Ubuntu Pro)	Oct 7, 2026	Oct 6, 2026

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