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CVE-2021-38578

nvd nist
Published: Mar 3, 2022Modified: Jun 17, 2026

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

Description

Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.

Affected (7)

Products: Tianocore: Edk2 · Insyde: Kernel
Tianocore
1 product
Edk2
Insyde
1 product
Kernel
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Edk2
Up to 202202
Configuration B
6 vulnerable
Vulnerable SoftwareAffected Versions
Insyde
Kernel
Version 5.0
Kernel
Version 5.1
Kernel
Version 5.2
Kernel
Version 5.3
Kernel
Version 5.4
Kernel
Version 5.5

Related CWEs

CWE-124
Buffer Underwrite ('Buffer Underflow')
The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.
CWE-787
Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.

References (5)

Source: infosec@edk2.groups.io
Issue TrackingVendor Advisory
Source: infosec@edk2.groups.io
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

Timeline

No history available yet.