CVE-2022-49111

Adjacent kernel memory corruption via Bluetooth disconnect

Published Feb 26, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel Bluetooth subsystem allows adjacent attackers to crash the kernel through a crafted disconnect event. hci_disconn_phylink_complete_evt calls hci_conn_del for a matched non-AMP connection without checking its type, freeing an hci_chan object that hci_send_acl later reads. Reachability requires active Bluetooth and an existing L2CAP or LE connection; exploitation can corrupt kernel memory or interrupt the system.

CVSS severity7.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux kernel Bluetooth subsystem allows adjacent attackers to crash the kernel through a crafted disconnect event. hci_disconn_phylink_complete_evt calls hci_conn_del for a matched non-AMP connection without checking its type, freeing an hci_chan object that hci_send_acl later reads. Reachability requires active Bluetooth and an existing L2CAP or LE connection; exploitation can corrupt kernel memory or interrupt the system.

The record

CVE
CVE-2022-49111
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.8
  2. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <2cc803804ec9a296b3156855d6c8c4ca1c6b84be
  3. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <3803d896ddd97c7c16689a5381c0960040727647
  4. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <4da302b90b96c309987eb9b37c8547f939f042d2
  5. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <643a6c26bd32e339d00ad97b8822b6db009e803c
  6. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <684e505406abaeabe0058e9776f9210bf2747953
  7. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502
  8. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <c41de54b0a963e59e4dd04c029a4a6d73f45ef9c
  9. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <d404765dffdbd8dcd14758695d0c96c52fb2e624
  10. Affected versionversion=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <f63d24baff787e13b723d86fe036f84bdbc35045

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <2cc803804ec9a296b3156855d6c8c4ca1c6b84be; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <3803d896ddd97c7c16689a5381c0960040727647; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <4da302b90b96c309987eb9b37c8547f939f042d2; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <643a6c26bd32e339d00ad97b8822b6db009e803c; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <684e505406abaeabe0058e9776f9210bf2747953; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <c41de54b0a963e59e4dd04c029a4a6d73f45ef9c; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <d404765dffdbd8dcd14758695d0c96c52fb2e624; version=9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6 <f63d24baff787e13b723d86fe036f84bdbc35045

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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-416CWE-416 Use After Free
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo