What is CVE-2021-28211?

CVE-2021-28211 is a medium-severity vulnerability in Tianocore Edk2, classified under Heap-based Buffer Overflow. CVSS score: 6.7/10. Published 2021-06-11.

How severe is CVE-2021-28211?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Tianocore Edk2

CVE-2021-28211

A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (30.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tianocore Edk2 — versions 202008
Tianocore Edk Ii — versions edk2-stable202008

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow
CWE-787 — Out-of-bounds Write

References

infosec@edk2.groups.io (Exploit, Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-28211?: CVE-2021-28211 is a medium-severity vulnerability in Tianocore Edk2, classified under Heap-based Buffer Overflow. CVSS score: 6.7/10. Published 2021-06-11.
How severe is CVE-2021-28211?: Medium severity. CVSS v3 base score is 6.7 out of 10.