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Critical severity · published Sep 29, 2026
CVE-2026-15390
Out-of-bounds write in Das U-Boot
9.0
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DU
Das U-Boot · DENX Software Engineering
2009.08 through 2026.07 · source: vendor
Affected product
DU
Das U-Boot
DENX Software Engineering
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15390
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15390
third-party-advisory
https://cert.pl/en/posts/2026/09/CVE-2026-15390
patch
https://source.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa