CVE-2025-14857 Semtech LR11xx Memory Write Access Control Bypass
An attacker with physical SPI access can overwrite stack memory to hijack control flow and execute arbitrary code during the session.
- 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-2025-14857?
CVE-2025-14857 is a medium-severity memory corruption vulnerability in Semtech LR1110, published on 7 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.
Weakness: CWE-123
Which versions are affected by CVE-2025-14857?
How do I fix CVE-2025-14857?
No fix has been published for CVE-2025-14857 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-2025-14857 being exploited?
There is no known exploitation of CVE-2025-14857 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-xjjj-2993-4g39.