CVE-2026-74222
Publication date 29 September 2026
Last updated 14 October 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| u-boot | 26.10 stonking |
Vulnerable
|
| 26.04 LTS resolute |
Fixed in 2025.10-0ubuntu2.2
|
|
| 24.04 LTS noble |
Fixed in 2025.10-0ubuntu0.24.04.4
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| u-boot-nezha | 26.10 stonking | Not in release |
| 26.04 LTS resolute | Not in release | |
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
Severity score breakdown
CVSS version:
Base score
8.8 · High
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
Base score
8.2 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8930-1
- U-Boot vulnerabilities
- 14 October 2026
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-74222
- 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