CVE-2026-74225
High
Description
U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the bootloader.
SeverityHigh
CVSS7.1
Exploit probability—
ProductU-boot
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- u-boot u-boot2026.10-rc5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| u-boot u-boot | v < 2026.10-rc5 | 2026.10-rc5 |
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