high
7.2
CWE
20
Advisory Published
Updated

CVE-2021-3970: Input Validation

First published: Fri Apr 22 2022(Updated: )

A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models BIOS may allow an attacker with local access and elevated privileges to execute arbitrary code.

Credit: psirt@lenovo.com

Affected SoftwareAffected VersionHow to fix
Lenovo Ideapad 3-14ada05 Firmware<e8cn33ww
Lenovo Ideapad 3-14ada05 Firmware
Lenovo ideapad 3-14ada6 firmware<hbcn21ww
Lenovo ideapad 3-14ada6 firmware
Lenovo Ideapad 3-14ALC6<glcn43ww
Lenovo Ideapad 3-14alc6 firmware
Lenovo IdeaPad 3-14ARE05 Firmware<dzcn42ww
Lenovo IdeaPad 3-14ARE05 Firmware
Lenovo Ideapad 3<hbcn21ww
Lenovo Ideapad 3
Lenovo Ideapad 3-15ALC6 Firmware<glcn43ww
Lenovo Ideapad 3-15ALC6 Firmware
Lenovo Ideapad 3-15ARE05 Firmware<dzcn42ww
Lenovo Ideapad 3-15are05 firmware
Lenovo Ideapad 3-15IGL05 Firmware<dvcn23ww
Lenovo ideapad 3-15igl05 firmware
Lenovo Ideapad 3-17ADA05 Firmware<e8cn33ww
Lenovo Ideapad 3-17ADA05 Firmware
Lenovo Ideapad 3-17ADA6<hbcn21ww
Lenovo Ideapad 3
Lenovo Ideapad 3-17ALC6 Firmware<glcn43ww
Lenovo Ideapad 3-17ALC6 Firmware
Lenovo Ideapad 3-17are05<dzcn42ww
Lenovo Ideapad 3
Lenovo Ideapad 3-17iil05<emcn52ww
Lenovo Ideapad 3-17IIL05 Firmware
Lenovo Ideapad 3-17ITL6<ggcn33ww
Lenovo Ideapad 3-17itl6 Firmware
Lenovo Ideapad 3-15ada05<e8cn33ww
Lenovo Ideapad 3
Lenovo IdeaPad L3 15IML05<ejcn27ww
Lenovo IdeaPad L3 15IML05
Lenovo L3-15ITL6 Firmware<gfcn23ww
Lenovo Ideapad 3-15ITL6
Lenovo L340-15IRH<bgcn35ww
Lenovo L340-15IRH Firmware
Lenovo L340-15IWl Touch Firmware<atcn46ww
Lenovo L340-15IWL Touch
Lenovo L340-15IWL Touch Firmware<atcn46ww
Lenovo L340-15IWL
Lenovo L340-17IRH Firmware<bgcn35ww
Lenovo L340-17IRH Firmware
Lenovo L340-17IWL<atcn46ww
Lenovo L340-17IWL Firmware
Lenovo Legion 5 Pro 16ACH6 Firmware<hhcn25ww
Lenovo Legion 5 Pro 16ACH6H
Lenovo Legion 5 Pro 16ACH6H<gkcn51ww
Lenovo Legion 5 Pro 16ACH6H
Lenovo Legion 5 Pro 16ITH6H Firmware<h1cn46ww
Lenovo Legion 5 Pro 16ITH6
Lenovo Legion 5 Pro 16ITH6H Firmware<h1cn46ww
Lenovo Legion 5 Pro 16ITH6
Lenovo Legion 5-15ACH6A Firmware<hhcn25ww
Lenovo Legion 5-15ACH6 Firmware
Lenovo Legion 5-15ACH6 Firmware<g9cn28ww
Lenovo Legion 5-15ACH6A Firmware
Lenovo Legion 5 - 17ACH6H<gkcn51ww
Lenovo Legion 5-15ACH6H Firmware
Lenovo Legion 5 Firmware<g8cn19ww
Lenovo Legion 5-15IMH6 Firmware
Lenovo Legion 5 15ITH6 Firmware<h1cn46ww
Lenovo Legion 5 15ITH6 Firmware
Lenovo Legion 5 15ITH6H<h1cn46ww
Lenovo Legion 5 15ITH6H
Lenovo Legion 5-17ACH6H Firmware<hhcn25ww
Lenovo Legion 5-17ACH6 Firmware
Lenovo Legion 5-17ACH6H Firmware<gkcn51ww
Lenovo Legion 5 - 17ACH6H
Lenovo Legion 5-17ITH6H Firmware<h1cn46ww
Lenovo Legion 5
Lenovo Legion 5 Firmware<h1cn46ww
Lenovo Legion 5-17ITH6H Firmware
Lenovo Legion 7 16ACHG6 Firmware<gkcn51ww
Lenovo Legion 7 16ACHG6 Firmware
Lenovo Legion 7-16ITHG6<gkcn51ww
Lenovo Legion 7 16ITHG6 Firmware
Lenovo Legion S7-15ACH6<hacn35ww
Lenovo Legion S7-15ACH6 Firmware
Lenovo Legion Y540<bhcn44ww
Lenovo Legion Y540-15IRH Firmware
Lenovo Legion Y540-15IRH Firmware<bhcn44ww
Lenovo Legion Y540-15IRH
Lenovo Legion Y540-17IRH<bhcn44ww
Lenovo Legion Y540
Lenovo Legion Y540-17IRH Firmware<bhcn44ww
Lenovo Legion Y540-17IRH-PG0 Firmware
Lenovo Legion Y545 Firmware<bhcn44ww
Lenovo Legion Y545 PG0
Lenovo Legion Y545 Firmware<bhcn44ww
Lenovo Legion Y545
Lenovo Legion Y7000P 2019 Firmware<bhcn44ww
Lenovo Legion Y7000 2019
Lenovo Legion Y7000-2019 Firmware<bhcn44ww
Lenovo Legion Y7000 2019
Lenovo S14 G2 ITL<ggcn33ww
Lenovo S14 G2 ITL Firmware
Lenovo S145-14IGM Firmware<bucn31ww
Lenovo S145-14API
Lenovo S145-14IGM Firmware<aycn26ww
Lenovo S145-14AST
Lenovo S145-14IGM Firmware<awcn28ww
Lenovo S145-14API
Lenovo S145-14IGM Firmware<dkcn54ww
Lenovo S145-14IIL Firmware
Lenovo S145-15api Firmware<bucn31ww
Lenovo S145-15api Firmware
Lenovo S145-15AST Firmware<aycn26ww
Lenovo S145-15api Firmware
Lenovo S145-15IGM<awcn28ww
Lenovo S145
Lenovo s145-15iil<dkcn54ww
Lenovo s145-15iil firmware
Lenovo S540-13API<cxcn34ww
Lenovo S540-13API Firmware
Lenovo S540-13IML
Lenovo S540-13ITL
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Yoga Slim 9-14ITL05 Firmware
Lenovo Yoga Slim 9-14ITL05
Lenovo v14 g1-iml<dxcn41ww
Lenovo V14
Lenovo V14 G2 ACL Firmware<glcn43ww
Lenovo V14 G2 ACL
Lenovo V14 G2 ITL<ggcn33ww
Lenovo V14 G2 ITL
Lenovo v14-ada firmware<e8cn33ww
Lenovo v14-ada firmware
Lenovo v14-are firmware<dzcn42ww
Lenovo v14-are firmware
Lenovo v14-igl firmware<dvcn23ww
Lenovo v14-igl firmware
Lenovo v14-iil firmware<dkcn54ww
Lenovo v14-iil firmware
Lenovo v140-15iwl<atcn46ww
Lenovo v140-15iwl firmware
Lenovo v15 G1-IML Firmware<dxcn41ww
Lenovo v15 G1-IML Firmware
Lenovo V15 G2-ALC<glcn43ww
Lenovo v15 g2 ijl
Lenovo v15 g2-itl firmware<ggcn33ww
Lenovo v15 g2-itl firmware
Lenovo v15-ada firmware<e8cn33ww
Lenovo v15-ada firmware
Lenovo v15-igl firmware<dvcn23ww
Lenovo v15-igl
Lenovo v15-iil<dkcn54ww
Lenovo v15-iil firmware
Lenovo V17 G2 ITL Firmware<ggcn33ww
Lenovo V17 G2 ITL
Lenovo v17-iil firmware<emcn52ww
Lenovo v17-iil
Lenovo v340-17iwl<atcn46ww
Lenovo v340-17iwl firmware
Lenovo Yoga 7-14ACN6 Firmware<h9cn26ww
Lenovo Yoga 7-14ACN6 Firmware
Lenovo Yoga C740-14IML<bncn44ww
Lenovo Yoga C740-14IML Firmware
Lenovo Yoga C740-15IML<bncn44ww
Lenovo Yoga C740-15IML Firmware
Lenovo Yoga C940 Firmware
Lenovo Yoga C940 Firmware
Lenovo Yoga Slim 7 Pro 14ACH5 Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ACH5 Firmware<gzcn27ww
Lenovo Yoga Slim 7 Pro 14ACH5 Firmware
Lenovo Yoga Slim 7 Pro 14ACH5 O Firmware<gzcn27ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ACH5 O Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ARH5 Firmware<g7cn21ww
Lenovo Yoga Slim 7 Pro
Lenovo Yoga Slim 7 Pro 14IHU5 Firmware
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Yoga Slim 7 Pro 14IHU5 Firmware
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Yoga Slim 7 Pro 14ITL5 Firmware
Lenovo Yoga Slim 7 Pro 14ITL5
Lenovo Yoga Slim 9 14IAP7 Firmware
Lenovo Slim 9 14ITL05 Firmware
Lenovo Ideapad 3 14iil05 Firmware<dvcn23ww
Lenovo Ideapad 3 14iil05 Firmware
Lenovo Ideapad 3-14IGL05 Firmware<emcn52ww
Lenovo ideapad 3-14igl05 firmware
Lenovo ideapad 3-14iml05<dxcn41ww
Lenovo Ideapad 3
Lenovo Ideapad 3-14itl6 firmware<gccn26ww
Lenovo ideapad 3-14itl6
Lenovo Ideapad 3-14itl6 firmware<ggcn33ww
Lenovo Ideapad 3-14itl6 firmware
Lenovo Ideapad 3-15IIL05 Firmware<emcn52ww
Lenovo Ideapad 3 15iil05
Lenovo L3 15IML05 Firmware<dxcn41ww
Lenovo IdeaPad L3 15IML05
Lenovo ideapad 3-15itl05<gccn26ww
Lenovo ideapad 3-15IML05
Lenovo Ideapad 3-15ITL6<ggcn33ww
Lenovo L3-15ITL6 Firmware
Lenovo ideapad 3 17IML05 firmware<dxcn41ww
Lenovo Ideapad 3 17IML05
Lenovo ideapad 5-14are05 firmware<e7cn44ww
Lenovo Ideapad 5-15are05 Firmware
Lenovo Ideapad 5-15iil05<dpcn54ww
Lenovo Ideapad 5-15iil05
Lenovo Ideapad Creator 5-15imh05 Firmware<egcn36ww
Lenovo Ideapad Creator 5-15imh05 Firmware
Lenovo Ideapad Gaming 3-15ARH05<fccn17ww
Lenovo Ideapad Gaming 3-15ARH05 Firmware
Lenovo Ideapad Gaming 3-15IMH05<egcn36ww
Lenovo Ideapad Gaming 3-15IMH05 Firmware

Remedy

Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-73440.

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-3970?

    The severity of CVE-2021-3970 is classified as high due to its potential to allow arbitrary code execution with local access.

  • How do I fix CVE-2021-3970?

    To fix CVE-2021-3970, users should update the BIOS on affected Lenovo Notebook models to the latest version provided by Lenovo.

  • Which Lenovo models are affected by CVE-2021-3970?

    CVE-2021-3970 affects various Lenovo ideapad models such as the 3-14ADA05, 3-14ADA6, and others specified in the security advisory.

  • What are the risks associated with CVE-2021-3970?

    The risks associated with CVE-2021-3970 include potential unauthorized access and control over the affected system, posing a significant security threat.

  • Is local access required to exploit CVE-2021-3970?

    Yes, local access is required to exploit CVE-2021-3970, making it a targeted risk mainly for environments with unauthorized physical access.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203