U-Boot <2026.10-rc5 OOB read in dhcp6_parse_options via DHCPv6
CVE-2026-74225 Published on September 29, 2026
U-Boot before 2026.10-rc5 Out-of-Bounds Write via DHCPv6
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.
Vulnerability Analysis
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-74225 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-74225
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Affected Versions
u-boot:- Before 2026.10-rc5 is affected.