CVE-2021-28211
CVE-2021-28211 is a medium-severity vulnerability in Tianocore Edk2 with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 6.7)
- CVSS v2: 4.6
- EPSS exploit prediction: 0% (31st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Tianocore Edk2
- Published:
- Last modified:
Description
A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.
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 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-28211 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-28211?
- CVE-2021-28211 affects Tianocore Edk2. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-28211?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-28211 published?
- CVE-2021-28211 was published on 2021-06-11 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:tianocore:edk2:202008:*:*:*:*:*:*:*
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