CVE-2021-32399

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.0Exploit: NoneExposed: 0

A fix is available — apply it.

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)
EG Risk
36(Track)
EG Risk 36/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity70% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
49.0%
KEV
Not listed

Published

May 10, 2021

Last Modified

November 21, 2024

References (12)

Vendor Advisories for CVE-2021-32399(18)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(24)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntukernel-image-5.8.0-63-generic-lpae-di (5.8.0-63.71) @ groovy2026-05-26ubuntu
ubuntulinux-image-lowlatency (5.11.0.22.23) @ hirsute2026-05-26ubuntu
ubuntulinux-image-oem-20.04-edge (5.10.0.1033.34) @ focal2026-05-26ubuntu
ubuntulinux-modules-5.4.0-1041-kvm (5.4.0-1041.42) @ focal2026-05-26ubuntu
ubuntulinux-image-raspi2-hwe-18.04 (5.4.0.1038.73) @ focal2026-05-26ubuntu
ubuntulinux-image-unsigned-5.11.0-1009-kvm (5.11.0-1009.9) @ hirsute2026-05-26ubuntu
ubuntuvlan-modules-4.15.0-151-generic-di (4.15.0-151.157~16.04.1) @ xenial2026-05-26ubuntu
ubuntulinux-image-lowlatency (4.4.0.222.229) @ xenial2026-05-26ubuntu
redhatkernel-0:2.6.32-754.43.1.el62022-01-18redhat
redhatkernel-0:3.10.0-693.94.1.el72021-10-05redhat
redhatkpatch-patch2021-09-14redhat
redhatkernel-0:3.10.0-1062.56.1.el72021-09-14redhat
redhatredhat-virtualization-host-0:4.3.18-20210903.0.el7_92021-09-09redhat
redhatkernel-0:3.10.0-957.80.1.el72021-08-31redhat
redhatkernel-0:4.18.0-193.64.1.el8_22021-08-31redhat
redhatkernel-rt-0:3.10.0-1160.41.1.rt56.1181.el72021-08-31redhat
redhatkernel-0:3.10.0-327.100.1.el72021-08-31redhat
redhatkernel-0:3.10.0-514.92.1.el72021-08-31redhat
redhatkernel-rt-0:4.18.0-193.64.1.rt13.115.el8_22021-08-31redhat
redhatkernel-0:3.10.0-1160.41.1.el72021-08-31redhat
redhatkernel-0:4.18.0-147.52.1.el8_12021-08-17redhat
redhatredhat-virtualization-host-0:4.4.7-20210715.1.el8_42021-07-22redhat
redhatkernel-0:4.18.0-305.10.2.el8_42021-07-20redhat
redhatkernel-rt-0:4.18.0-305.10.2.rt7.83.el8_42021-07-20redhat

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.

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 15× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-07-23 02:00 UTCEG score recompute
  2. 2026-07-22 22:47 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
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  10. 2026-07-19 02:27 UTCEPSS rescore
  11. 2026-07-18 20:59 UTCOSV refresh
  12. 2026-07-18 10:02 UTCEPSS rescore
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  14. 2026-07-16 17:00 UTCEPSS rescore
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  24. 2026-07-09 19:07 UTCEPSS rescore
  25. 2026-07-08 15:12 UTCEPSS rescore
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  1. 2026-07-07 13:43 UTCEPSS rescore
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  8. 2026-07-01 15:04 UTCEPSS rescore
  9. 2026-07-01 03:48 UTCOSV refresh
  10. 2026-06-30 23:20 UTCEPSS rescore
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  25. 2026-06-21 14:55 UTCEPSS rescore
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  37. 2026-06-13 22:58 UTCEPSS rescore
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  39. 2026-06-13 06:43 UTCOSV refresh
  40. 2026-06-12 23:10 UTCEPSS rescore
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  42. 2026-06-11 13:58 UTCEPSS rescore
  43. 2026-06-10 22:16 UTCEPSS rescore
  44. 2026-06-10 13:20 UTCEPSS rescore
  45. 2026-06-08 14:15 UTCEPSS rescore
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  49. 2026-06-06 13:46 UTCEPSS rescore
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  71. 2026-05-27 13:39 UTCEPSS rescore
  72. 2026-05-26 16:51 UTCEG score recompute
  73. 2026-05-26 16:51 UTCVendor advisory
  74. 2026-05-26 16:50 UTCGHSA enrichment
  75. 2026-05-26 13:42 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

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 49.0% 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

Explore the affected products and dependency analysis for CVE-2021-32399

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