CVE-2021-3433 is a low-severity vulnerability affecting Zephyr RTOS versions 2.5.0 and later, where an invalid channel map in a CONNECT_IND message can lead to a deadlock due to improper handling of exceptional conditions (CWE-703). This local attack requires low privileges and has a low impact on availability, with no impact on confidentiality or integrity. There is no public exploit code available, it is not listed in CISA's KEV catalog, and while there's minimal community discussion and media coverage, it is not actively exploited.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.5.0, < 2.6.0CPE matchmatch criteria | cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.