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.
History

Fri, 02 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared U-boot
U-boot u-boot
Vendors & Products U-boot
U-boot u-boot

Tue, 29 Sep 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback
First Time appeared Denx
Denx u-boot
Weaknesses CWE-416
CPEs cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*
Vendors & Products Denx
Denx u-boot
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-29T21:29:23.960Z

Updated: 2026-10-02T12:30:17.284Z

Reserved: 2026-08-14T18:01:19.916Z

Link: CVE-2026-74222

cve-icon Vulnrichment

Updated: 2026-10-02T12:30:12.774Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T22:18:33.660

Modified: 2026-10-02T13:17:54.703

Link: CVE-2026-74222

cve-icon Redhat

No data.