CVE-2021-32399 Race condition in n/a

High 7.0 Published 10 May 2021 Updated 3 Aug 2024

A race condition in the Linux kernel Bluetooth subsystem allows attackers to cause a denial of service during controller removal.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2021-32399?

CVE-2021-32399 is a high-severity vulnerability in Debian Debian Linux, published on 10 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI controller.

Weakness: CWE-362

Which versions are affected by CVE-2021-32399?

It affects 11 products.

Linux distribution packages (18)

`kpatch-patch-3_10_0-957_61_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_61_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_61_2` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_61_2-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_62_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_62_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_65_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_65_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_66_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_66_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-5.el7`
`kpatch-patch-3_10_0-957_70_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-4.el7`
`kpatch-patch-3_10_0-957_70_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-4.el7`
`kpatch-patch-3_10_0-957_72_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-2.el7`
`kpatch-patch-3_10_0-957_72_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-2.el7`
`kpatch-patch-3_10_0-957_76_1` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-2.el7`
`kpatch-patch-3_10_0-957_76_1-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-2.el7`
`kpatch-patch-3_10_0-957_78_2` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-1.el7`
`kpatch-patch-3_10_0-957_78_2-debuginfo` Red Hat:rhel_e4s:7.6::server	All versions	`0:1-1.el7`

Products include Debian Debian Linux, Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410s Firmware and 5 more.

How do I fix CVE-2021-32399?

Apply the vendor's patch.

Is CVE-2021-32399 being exploited?

There is no known exploitation of CVE-2021-32399 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Debian Debian Linux vulnerabilities

Sources

Also known as AZL-6560, DEBIAN-CVE-2021-32399, GHSA-xw4j-8m9c-4vwq, RHSA-2021:3392, UBUNTU-CVE-2021-32399.