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Vulnerability record · CVE-2021-32399 · published 10 May 2021

CVE-2021-32399: Linux kernel race condition vulnerability

Linux · Linux Kernel

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

7.0 CVSS 3.1 High EPSS 0.69% · top 48.7% CWE-362 · Race condition
7.0CVSS 3.1 base score, v2 4.4
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/05/11/2 ExploitMailing ListPatchThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e2cb6b891ad2b8caa9131e3be70f45243df82a80 Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commit/e2cb6b891ad2b8caa9131e3be70f45243df82a80 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20210622-0006/ Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/2 ExploitMailing ListPatchThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e2cb6b891ad2b8caa9131e3be70f45243df82a80 Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commit/e2cb6b891ad2b8caa9131e3be70f45243df82a80 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20210622-0006/ Third Party Advisory

Track CVE-2021-32399 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2021-32399), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.