CVE-2021-43400 is a critical use-after-free vulnerability in BlueZ 5.61, specifically within the gatt-database.c component. This flaw affects BlueZ and Debian Linux distributions, occurring when a client disconnects during D-Bus processing of a WriteValue call. With a CVSS score of 9.1 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity and no user interaction, potentially leading to high impact on confidentiality and integrity. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.61CPE matchmatch criteria | cpe:2.3:a:bluez:bluez:5.61:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
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:N
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.