CVE-2025-20109 Privilege escalation in Intel(R) Processors
An authenticated local attacker can escalate privileges due to improper isolation in the Intel processor stream cache mechanism.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-20109?
CVE-2025-20109 is a high-severity vulnerability in Intel(R) Processors, published on 12 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.
Weakness: CWE-653
Which versions are affected by CVE-2025-20109?
How do I fix CVE-2025-20109?
Apply the vendor's patch.
Is CVE-2025-20109 being exploited?
There is no known exploitation of CVE-2025-20109 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2025-20109, BELL-CVE-2025-20109, DEBIAN-CVE-2025-20109, GHSA-3cpg-9r3v-qv5v, UBUNTU-CVE-2025-20109.