CVE-2026-43322

Kernel memory corruption via stale Bluetooth connection reference

Published May 8, 2026 · Updated May 8, 2026

Use-after-free in Linux Kernel 6.19 through 6.19.11 allows physically proximate attackers to corrupt kernel memory via Bluetooth LE. The le_read_features_complete callback calls hci_conn_drop after its hci_conn object has been freed because command-sync dequeueing cannot cancel the queued completion. Triggering requires adjacent Bluetooth reachability and the connection teardown race; the published trace demonstrates a four-byte write to freed slab memory but no stable exploit outcome.

CVSS severity8.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel 6.19 through 6.19.11 allows physically proximate attackers to corrupt kernel memory via Bluetooth LE. The le_read_features_complete callback calls hci_conn_drop after its hci_conn object has been freed because command-sync dequeueing cannot cancel the queued completion. Triggering requires adjacent Bluetooth reachability and the connection teardown race; the published trace demonstrates a four-byte write to freed slab memory but no stable exploit outcome.

The record

CVE
CVE-2026-43322
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.19
  2. Affected versionversion=a106e50be74b0896583f4d010a69f9806e4194f4 <035c25007c9e698bef3826070ee34bb6d778020c
  3. Affected versionversion=a106e50be74b0896583f4d010a69f9806e4194f4 <260dc2be643b4a35b27008490c533613e3e53867

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.19; version=a106e50be74b0896583f4d010a69f9806e4194f4 <035c25007c9e698bef3826070ee34bb6d778020c; version=a106e50be74b0896583f4d010a69f9806e4194f4 <260dc2be643b4a35b27008490c533613e3e53867

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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