CVE-2026-74222

EUVD-2026-89435
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.2 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 22.86%
Debian logo
Debian Releases
Debian Product
Codename
u-boot
bookworm
2023.01+dfsg-2+deb12u3
fixed
bookworm (security)
2023.01+dfsg-2+deb12u3
fixed
forky
2025.01-3.2
fixed
sid
2025.01-3.2
fixed
trixie
2025.01-3+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
u-boot
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
Fixed in 2025.10-0ubuntu0.24.04.4
released
resolute
Fixed in 2025.10-0ubuntu2.2
released
stonking
Fixed in 2025.10-0ubuntu6
released
xenial
not-affected
u-boot-nezha
jammy
needs-triage
noble
needs-triage
resolute
dne
stonking
dne
Common Weakness Enumeration
References
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