CVE-2026-71974 U-Boot before 2026.10-rc3 Out-of-Bounds Write via Android Bootmeth Partition Read
Attackers with physical access can execute arbitrary code or escalate privileges via crafted boot media exploiting an out-of-bounds write in U-Boot.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71974?
CVE-2026-71974 is a medium-severity memory corruption vulnerability in u-boot, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
U-Boot before 2026.10-rc3 contains an out-of-bounds write vulnerability in read_slotted_partition() that fails to validate image size against partition bounds. Attackers with physical access can supply crafted boot media with oversized headers to write past the load buffer into bootloader memory on devices without Android Verified Boot protection.
Weakness: CWE-787
Which versions are affected by CVE-2026-71974?
How do I fix CVE-2026-71974?
No fix has been published for CVE-2026-71974 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-71974 being exploited?
There is no known exploitation of CVE-2026-71974 in the wild and no public exploit code.
Sources
Also known as GHSA-c7vr-vjm2-3grc, UBUNTU-CVE-2026-71974.