CVE-2021-27433 is a critical integer wrap-around vulnerability in the ARM mbed-ualloc memory library version 1.3.0, specifically within the mbed_krbs function. This flaw can lead to arbitrary memory allocation, potentially causing system crashes or enabling remote code injection/execution. With a CVSS score of 9.8 (CRITICAL), it is easily exploitable over the network with low attack complexity and no user interaction, allowing for high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.3.0CPE matchmatch criteria | cpe:2.3:a:arm:mbed_ualloc:1.3.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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.