Vulnerability · Published Aug 12, 2025 · Assigned by intel
CVE-2025-20109
High 7.8
In plain English
A high-severity security flaw in Intel(R) Processors. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 95.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-20109 |
| Alpine:v3.21 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-20109 |
| Alpine:v3.22 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-20109 |
| Alpine:v3.23 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-20109 |
| Alpine:v3.24 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-20109 |
| Debian:12 | intel-microcode | 3.20250812.1~deb12u1 | DEBIAN-CVE-2025-20109 |
| Debian:12 | intel-microcode | 3.20250812.1~deb12u1 | DSA-6030-1 |
| Debian:13 | intel-microcode | 3.20250812.1~deb13u1 | DEBIAN-CVE-2025-20109 |
| Debian:13 | intel-microcode | 3.20250812.1~deb13u1 | DSA-6030-1 |
| Debian:14 | intel-microcode | 3.20250812.1 | DEBIAN-CVE-2025-20109 |
| Ubuntu:22.04:LTS | intel-microcode | 3.20250812.0ubuntu0.22.04.1 | USN-7866-1 |
| Ubuntu:22.04:LTS | intel-microcode | 3.20250812.0ubuntu0.22.04.1 | UBUNTU-CVE-2025-20109 |
| Ubuntu:24.04:LTS | intel-microcode | 3.20250812.0ubuntu0.24.04.1 | USN-7866-1 |
| Ubuntu:24.04:LTS | intel-microcode | 3.20250812.0ubuntu0.24.04.1 | UBUNTU-CVE-2025-20109 |
| Ubuntu:25.10 | intel-microcode | 3.20250812.0ubuntu0.25.10.1 | UBUNTU-CVE-2025-20109 |
| Ubuntu:25.10 | intel-microcode | 3.20250812.0ubuntu0.25.10.1 | USN-7866-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Intel(R) Processors | See references |
Weakness: CWE-653 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H