CVE-2021-40506 is a critical vulnerability affecting the ALU unit of the OpenRISC 1200 processor (versions 2011-09-10 through 2015-11-11), where the overflow flag is not correctly updated for msb and mac instructions, potentially leading to execution corruption in dependent software. With a CVSS score of 9.8 (CRITICAL), this network-exploitable flaw requires no user interaction and could result in complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2011-09-10, <= 2015-11-11CPE matchmatch criteria | cpe:2.3:o:openrisc:or1200_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.