CVE-2026-74222
High
Description
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductU-boot
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-416Use after free
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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