Unknown severity · Source severity not reportedCVE-2026-43022

Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if existsCVE-2026-43022

Answer in brief

CVE-2026-43022 records a Unknown severity vulnerability in Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 1, 2026Updated Oct 15, 2026Source checked Oct 15, 2026First seen by HOL Oct 15, 2026Material review Oct 15, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	6.9	Not reported
Linux/Linuxgeneric	>=505ea2b295929e7be2b4e1bc86ee31cb7862fb01 <5cfa4f537a056c91ac6c09bc3ab58a4455217df7 \|\| >=505ea2b295929e7be2b4e1bc86ee31cb7862fb01 <0ad2ce230b38cd4b3f6732cc609e270461e626e5 \|\| >=505ea2b295929e7be2b4e1bc86ee31cb7862fb01 <2969554bcfccb5c609f6b6cd4a014933f3a66dd0 \|\| f00f36db76eb8fd10d13e80e2590f23b5beaa54d \|\| 1499f79995c7ee58e3bfeeff75f6d1b37dcda881 \|\| 357603f4d396d85fbf0045512efaf1d7f7394ed7 \|\| >=6.1.120 <6.2 \|\| >=6.6.51 <6.7 \|\| >=6.8.9 <6.9	5cfa4f537a056c91ac6c09bc3ab58a4455217df7, 0ad2ce230b38cd4b3f6732cc609e270461e626e5, 2969554bcfccb5c609f6b6cd4a014933f3a66dd0, 6.2, 6.7, 6.9

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 5cfa4f537a056c91ac6c09bc3ab58a4455217df7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists hci_cmd_sync_queue_once() needs to indicate whether a queue item was added, so caller can know if callbacks are called, so it can avoid leaking resources. Change the function to return -EEXIST if queue item already exists. Modify all callsites to handle that.

Quoted source text, attributed separately from HOL analysis.