CVE-2025-70293 Integer overflow in n/a
An integer overflow in U-Boot's ext4fs_get_bgdtable function allows arbitrary code execution or denial of service via under-allocated buffer usage.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-70293?
CVE-2025-70293 is a critical vulnerability in n/a, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability exists in function ext4fs_get_bgdtable, the size calculation can lead to under allocation and this underallocated buffer will be used in memcpy() which could lead to arbitrary code execution, a denial of service, or other unspecified impacts.
Which versions are affected by CVE-2025-70293?
How do I fix CVE-2025-70293?
Upgrade to a fixed version.
Is CVE-2025-70293 being exploited?
There is no known exploitation of CVE-2025-70293 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-70293, GHSA-jgm9-xpcw-hqh9, UBUNTU-CVE-2025-70293.