What’s Vulnerable › Vulnerabilities

CVE-2026-15390: Out-of-bounds write in Das U-Boot

• Severity: critical (CVSS 9.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-29 · updated 2026-09-30
• Weakness: CWE-459

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.

Affected products

• DENX Software Engineering Das U-Boot: from 2009.08 through 2026.07

References

• https://cert.pl/en/posts/2026/09/CVE-2026-15390
• https://source.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa

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