What is CVE-2022-40250?

CVE-2022-40250 is a high-severity vulnerability in Ami Aptio, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2022-09-20.

How severe is CVE-2022-40250?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Ami Aptio

CVE-2022-40250

An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in System Management Mode - an environment more privileged than operating system (OS) and completely isolated from it. Running arbitrary code in SMM additionally bypasses SMM-based SPI flash protections against modifications, which can help an attacker to install a firmware backdoor/implant into BIOS. Such a malicious firmware code in BIOS could persist across operating system re-installs. Additionally, this vulnerability potentially could be used by malicious actors to bypass security mechanisms provided by UEFI firmware (for example, Secure Boot and some types of memory isolation for hypervisors). This issue affects: Module name: SmmSmbiosElog SHA256: 3a8acb4f9bddccb19ec3b22b22ad97963711550f76b27b606461cd5073a93b59 Module GUID: 8e61fd6b-7a8b-404f-b83f-aa90a47cabdf This issue affects: AMI Aptio 5.x. This issue affects: AMI Aptio 5.x.

Vulnerability class: Buffer Overflow

Published 2022-09-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Ami Aptio — versions 5.x
Ami Aptio V — versions 5.0
Intel Nuc M15 Laptop Kit Lapbc510
Intel Nuc M15 Laptop Kit Lapbc510 Firmware — versions bc0074
Intel Nuc M15 Laptop Kit Lapbc710
Intel Nuc M15 Laptop Kit Lapbc710 Firmware — versions bc0074

Weakness classification (CWE)

References

www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712.html (Third Party Advisory, Not Applicable)
www.ami.com/security-center/ (Vendor Advisory)
www.binarly.io/advisories/BRLY-2022-016 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40250?: CVE-2022-40250 is a high-severity vulnerability in Ami Aptio, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2022-09-20.
How severe is CVE-2022-40250?: High severity. CVSS v3 base score is 8.8 out of 10.