CVE-2021-3752 is a use-after-free race condition in the Linux kernel's Bluetooth subsystem, affecting Debian, Fedora, Linux, NetApp, Oracle, and Red Hat products. This vulnerability has a CVSS score of 7.1 (HIGH), indicating that an attacker with low privileges and physical access to the network could achieve high impact on confidentiality, integrity, and availability. While no public exploits or Metasploit modules are available, and it is not on CISA's KEV catalog, there has been minimal community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.6.12, < 4.4.293CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 4.5, < 4.9.291CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 4.10, < 4.14.256CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 4.15, < 4.19.218CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 4.20, < 5.4.160CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:H/PR:L/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 0.2 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality integrity as well as system availability.
Feb 8, 2022kernel: possible use-after-free in bluetooth module
Sep 14, 2021