CVE-2021-32399

HIGHNVD 7.07.0—

7.0

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

CVSS v3: 7.0
EG Score: 7.0(medium)
EPSS: 20.0%
KEV: Not listed

Published

May 10, 2021

Last Modified

November 21, 2024

References (12)

cve@mitrehttp://www.openwall.com/lists/oss-security/2021/05/11/2
cve@mitrehttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e2cb6b891ad2b8caa9131e3be70f45243df82a80
cve@mitrehttps://github.com/torvalds/linux/commit/e2cb6b891ad2b8caa9131e3be70f45243df82a80
cve@mitrehttps://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
cve@mitrehttps://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
cve@mitrehttps://security.netapp.com/advisory/ntap-20210622-0006/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/05/11/2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e2cb6b891ad2b8caa9131e3be70f45243df82a80
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/e2cb6b891ad2b8caa9131e3be70f45243df82a80
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210622-0006/

Patch Availability(24)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	kernel-image-5.8.0-63-generic-lpae-di (5.8.0-63.71) @ groovy	2026-05-26	ubuntu
ubuntu	linux-image-lowlatency (5.11.0.22.23) @ hirsute	2026-05-26	ubuntu
ubuntu	linux-image-oem-20.04-edge (5.10.0.1033.34) @ focal	2026-05-26	ubuntu
ubuntu	linux-modules-5.4.0-1041-kvm (5.4.0-1041.42) @ focal	2026-05-26	ubuntu
ubuntu	linux-image-raspi2-hwe-18.04 (5.4.0.1038.73) @ focal	2026-05-26	ubuntu
ubuntu	linux-image-unsigned-5.11.0-1009-kvm (5.11.0-1009.9) @ hirsute	2026-05-26	ubuntu
ubuntu	vlan-modules-4.15.0-151-generic-di (4.15.0-151.157~16.04.1) @ xenial	2026-05-26	ubuntu
ubuntu	linux-image-lowlatency (4.4.0.222.229) @ xenial	2026-05-26	ubuntu
redhat	kernel-0:2.6.32-754.43.1.el6	2022-01-18	redhat
redhat	kernel-0:3.10.0-693.94.1.el7	2021-10-05	redhat
redhat	kpatch-patch	2021-09-14	redhat
redhat	kernel-0:3.10.0-1062.56.1.el7	2021-09-14	redhat
redhat	redhat-virtualization-host-0:4.3.18-20210903.0.el7_9	2021-09-09	redhat
redhat	kernel-0:3.10.0-957.80.1.el7	2021-08-31	redhat
redhat	kernel-0:4.18.0-193.64.1.el8_2	2021-08-31	redhat
redhat	kernel-rt-0:3.10.0-1160.41.1.rt56.1181.el7	2021-08-31	redhat
redhat	kernel-0:3.10.0-327.100.1.el7	2021-08-31	redhat
redhat	kernel-0:3.10.0-514.92.1.el7	2021-08-31	redhat
redhat	kernel-rt-0:4.18.0-193.64.1.rt13.115.el8_2	2021-08-31	redhat
redhat	kernel-0:3.10.0-1160.41.1.el7	2021-08-31	redhat
redhat	kernel-0:4.18.0-147.52.1.el8_1	2021-08-17	redhat
redhat	redhat-virtualization-host-0:4.4.7-20210715.1.el8_4	2021-07-22	redhat
redhat	kernel-0:4.18.0-305.10.2.el8_4	2021-07-20	redhat
redhat	kernel-rt-0:4.18.0-305.10.2.rt7.83.el8_4	2021-07-20	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 16:51 UTCEG score recompute
2026-05-26 16:51 UTCVendor advisory
2026-05-26 16:50 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-32399?

CVE-2021-32399 is a high vulnerability published on May 10, 2021. net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI controller.

When was CVE-2021-32399 disclosed?

CVE-2021-32399 was first published in the National Vulnerability Database on May 10, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-32399 actively exploited?

CVE-2021-32399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-32399?

CVE-2021-32399 has a CVSS v3 base score of 7.0 (NVD).

How do I remediate CVE-2021-32399?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-32399, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-32399

Published

Last Modified

References (12)

Patch Availability(24)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-32399?

CVE-2021-32399

Published

Last Modified

References (12)

Patch Availability(24)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-32399?

Same vendor

Same CWE

CVE-2021-32399

📅 Published

🔄 Last Modified

🔗 References (12)

Patch Availability(24)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-32399?

CVE-2021-32399

📅 Published

🔄 Last Modified

🔗 References (12)

Patch Availability(24)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-32399?

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References (12)

Frequently asked(5)

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References (12)

Frequently asked(5)

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