CVE-2022-2347: Unchecked Download size in Uboot

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-09-23 · updated 2026-06-17
Weakness: CWE-122

Description

There exists an unchecked length field in UBoot. The U-Boot DFU implementation does not bound the length field in USB DFU download setup packets, and it does not verify that the transfer direction corresponds to the specified command. Consequently, if a physical attacker crafts a USB DFU download setup packet with a `wLength` greater than 4096 bytes, they can write beyond the heap-allocated request buffer.

Affected products

u-boot: from 2012.10 through 2022.07

References

https://seclists.org/oss-sec/2022/q3/41
https://lists.debian.org/debian-lts-announce/2025/05/msg00001.html
https://seclists.org/oss-sec/2022/q3/41
https://cert-portal.siemens.com/productcert/html/ssa-577017.html

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