CVE-2021-28216: tianocore edk_ii
Vulnerability summary
CVE-2021-28216 is a high (CVSS 7.8) vulnerability in tianocore edk_ii. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 36.6% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 05-08-2021PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
Description
BootPerformanceTable pointer is read from an NVRAM variable in PEI. Recommend setting PcdFirmwarePerformanceDataTableS3Support to FALSE.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
37%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.42% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugzilla.tianocore.org)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-587Assignment of a Fixed Address to a PointerThe product sets a pointer to a specific address other than NULL or 0.
- CWE-763Release of Invalid Pointer or ReferenceThe product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- edk2< 2021.11~rc1-1
Tianocore1 product
- edk_iiEDK II Master | na
Ubuntu1 product
- edk2All versions (No fix recorded)
3 vendors · 3 products
