U-Boot <2026.10-rc5 Use-After-Free in httpc_recv_cb() lwIP wget
CVE-2026-74222 Published on September 29, 2026
U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback
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.
Vulnerability Analysis
CVE-2026-74222 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-74222 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-74222
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Affected Versions
u-boot:- Before 2026.10-rc5 is affected.