What is CVE-2020-8354?

CVE-2020-8354 is a medium-severity vulnerability in Lenovo Bios, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.4/10. Published 2020-11-11.

How severe is CVE-2020-8354?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Lenovo Bios

CVE-2020-8354

A potential vulnerability in the SMI callback function used in the VariableServiceSmm driver in some Lenovo Notebook models may allow arbitrary code execution.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.002 (15.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Lenovo Bios — versions unspecified
Lenovo Notebook
Lenovo Notebook_firmware

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

psirt@lenovo.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-8354?: CVE-2020-8354 is a medium-severity vulnerability in Lenovo Bios, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.4/10. Published 2020-11-11.
How severe is CVE-2020-8354?: Medium severity. CVSS v3 base score is 6.4 out of 10.