CVE-2026-71971
U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader.
- Published Sep 29, 2026
- CVSS 8.8 high
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available