CVE-2026-74222

HIGHCVSS 8.2

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.

Timeline

Published:September 29th, 2026 10:18 PM

Last modified:September 30th, 2026 4:40 PM

CVSS Scoring

CVSS v3: 8.2 (HIGH)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Weaknesses (CWE)

CWE-416

References & Reports

Advisories, patches, and third-party reports

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

Source: NIST NVD · Data may lag official sources by up to one minute