Hacking, PenTest, and Cybersecurity Tools for Your Security Arsenal!

Loading CVE intelligence

Loading vulnerability catalog

Kitploit is a directory of hacking, cybersecurity, and pentesting tools. Discover the latest project updates to find vulnerabilities, analyze systems, automate testing, and strengthen your security.

Tool Directory

CVE-2021-33034

HighPublished

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing...

Published: May 14, 2021
Updated: Aug 3, 2024
Assigning CNA: mitre
Evidence observed: Aug 25, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.8%

Low · next 30 days

Percentile: 55.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.

Sources

device_renesas_kernel_AOSP10_r33_CVE-2021-33034Patch
Kernel source tree for Renesas AOSP10 R33 with a patch for CVE-2021-33034, addressing a use-after-free vulnerability in the Bluetooth HCI event processing.

Responsible use

Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.