CVE-2026-74222

Summary

U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.

Affected Software

Weaknesses

• CWE-416: Use After Free

References

• https://github.com/u-boot/u-boot/commit/2d94618a58aeb7630f18eee33419ce48d0fd3616
• https://github.com/u-boot/u-boot/blob/v2026.07/net/lwip/wget.c#L194
• https://github.com/u-boot/u-boot
• https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-use-after-free-in-lwip-wget-receive-callback

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