CVE-2025-27243 Memory corruption in Intel(R) Ethernet Controller E810

Medium 6.7 Published 10 Feb 2026 Updated 10 Feb 2026

A privileged local attacker can cause a denial of service via an out-of-bounds write in Intel E810 Ethernet Controller firmware.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-27243?

CVE-2025-27243 is a medium-severity memory corruption vulnerability in Intel(R) Ethernet Controller E810, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Out-of-bounds write in the firmware for some Intel(R) Ethernet Controller E810 before version cvl fw 1.7.8.x within Ring 0: Bare Metal OS may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

Weakness: CWE-787

Which versions are affected by CVE-2025-27243?

It affects 1 product.

Products include Intel Ethernet Controller.

How do I fix CVE-2025-27243?

No fix has been published for CVE-2025-27243 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-2025-27243 being exploited?

There is no known exploitation of CVE-2025-27243 in the wild and no public exploit code.

Sources

Also known as GHSA-95x2-9xvr-3xpw.