CVE-2022-1891 Memory corruption in BIOS
A local attacker can exploit a buffer overflow in Lenovo Notebook BIOS to execute arbitrary code and escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-1891?
CVE-2022-1891 is a medium-severity memory corruption vulnerability in Lenovo BIOS, published on 23 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A buffer overflow in the SystemLoadDefaultDxe driver in some Lenovo Notebook products may allow an attacker with local privileges to execute arbitrary code.
Which versions are affected by CVE-2022-1891?
It affects 6 products.
Products include Lenovo Thinkbook 14-Iil Firmware, Lenovo Thinkbook 14-Iml Firmware, Lenovo Thinkbook 15-Iil Firmware, Lenovo Thinkbook 15-Iml Firmware, Lenovo Yoga C640-13iml Firmware, Lenovo Yoga C640-13iml Lte Firmware.
How do I fix CVE-2022-1891?
No fix has been published for CVE-2022-1891 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-1891 being exploited?
There is no known exploitation of CVE-2022-1891 in the wild and no public exploit code.
Other vulnerabilities in Lenovo BIOS
Sources
Also known as GHSA-f95f-f57p-rc4m.