CVE-2021-28211
MEDIUMCVSS 6.7/10EPSS 0.39%
Last modified
CVE-2021-28211 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tianocore | Edk2 | 202008 |
References
- https://bugzilla.tianocore.org/show_bug.cgi?id=1816Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugzilla.tianocore.org/show_bug.cgi?id=1816Exploit, Issue Tracking, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-28211?
A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.
How severe is CVE-2021-28211?
CVE-2021-28211 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28211?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-28211?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST