Buffer overflow in Insyde Kernel
CVE-2021-38578
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
EPSS: 0.010 (58.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L.
Affected products
- Insyde Kernel — versions 5.0, 5.1, 5.2
- Tianocore Edk2
- Tianocore Edk Ii — versions edk2-stable202208
Weakness classification (CWE)
Public proof-of-concept exploits
References
- infosec@edk2.groups.io (x_refsource_MISC, Issue Tracking, Vendor Advisory)
- infosec@edk2.groups.io (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-38578?
- CVE-2021-38578 is a high-severity vulnerability in Insyde Kernel, classified under Buffer Underwrite. CVSS score: 7.4/10. Published 2022-03-03.
- How severe is CVE-2021-38578?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2021-38578 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.