Vulnerability · Published Aug 12, 2025 · Assigned by intel
CVE-2025-26403
High 7.2
In plain English
A high-severity out-of-bounds write in Intel(R) Xeon(R) 6 processors when using Intel(R) SGX or Intel(R) TDX. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.2%top 95.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Out-of-bounds write in the memory subsystem for some Intel(R) Xeon(R) 6 processors when using Intel(R) SGX or Intel(R) TDX may allow a privileged 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-2025-26403 |
| Alpine:v3.21 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-26403 |
| Alpine:v3.22 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-26403 |
| Alpine:v3.23 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-26403 |
| Alpine:v3.24 | intel-ucode | 20250812-r0 | ALPINE-CVE-2025-26403 |
| Debian:12 | intel-microcode | 3.20250812.1~deb12u1 | DEBIAN-CVE-2025-26403 |
| Debian:12 | intel-microcode | 3.20250812.1~deb12u1 | DSA-6030-1 |
| Debian:13 | intel-microcode | 3.20250812.1~deb13u1 | DEBIAN-CVE-2025-26403 |
| Debian:13 | intel-microcode | 3.20250812.1~deb13u1 | DSA-6030-1 |
| Debian:14 | intel-microcode | 3.20250812.1 | DEBIAN-CVE-2025-26403 |
| 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-2025-26403 |
| 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-2025-26403 |
| Ubuntu:25.10 | intel-microcode | 3.20250812.0ubuntu0.25.10.1 | UBUNTU-CVE-2025-26403 |
| 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) Xeon(R) 6 processors when using Intel(R) SGX or Intel(R) TDX | See references |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N