CVE-2022-33906 describes a Time-of-Check to Time-of-Use (TOCTOU) vulnerability in Insyde kernels (versions 5.2, 5.3, 5.4, 5.5) where malicious DMA transactions targeting input buffers of the FwBlockServiceSmm software SMI handler can lead to SMRAM corruption. With a CVSS score of 6.4 (Medium), this vulnerability requires high privileges and local access (AV:L/PR:H) but can result in high impact to confidentiality, integrity, and availability (C:H/I:H/A:H). There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on the CISA KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5.2, < 5.2.05.27.23CPE matchmatch criteria | cpe:2.3:a:insyde:kernel:*:*:*:*:*:*:*:* | ||
>= 5.3, < 5.3.05.36.23CPE matchmatch criteria | cpe:2.3:a:insyde:kernel:*:*:*:*:*:*:*:* | ||
>= 5.4, < 5.4.05.44.23CPE matchmatch criteria | cpe:2.3:a:insyde:kernel:*:*:*:*:*:*:*:* | ||
>= 5.5, < 5.5.05.52.23CPE matchmatch criteria | cpe:2.3:a:insyde:kernel:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.