CVE-2022-42896

Remote code execution via Bluetooth L2CAP use-after-free

Published Nov 23, 2022 · Updated Apr 21, 2025

Use-after-free in Linux Kernel net/bluetooth/l2cap_core.c allows remote attackers to execute code or leak kernel memory via Bluetooth. The l2cap_connect and l2cap_le_connect_req handlers continue using freed channel objects during Bluetooth L2CAP connection handshakes, enabling memory corruption and disclosure. Exploitation requires a physically proximate attacker able to send Bluetooth traffic; consequences include kernel memory leakage, denial of service, or arbitrary code execution.

CVSS severity8.1
High
EPSS probability2.10%
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 net/bluetooth/l2cap_core.c allows remote attackers to execute code or leak kernel memory via Bluetooth. The l2cap_connect and l2cap_le_connect_req handlers continue using freed channel objects during Bluetooth L2CAP connection handshakes, enabling memory corruption and disclosure. Exploitation requires a physically proximate attacker able to send Bluetooth traffic; consequences include kernel memory leakage, denial of service, or arbitrary code execution.

The record

CVE
CVE-2022-42896
Published
Nov 23, 2022
Updated
Apr 21, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record 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=3.0.0 <=711f8c3fb3db61897080468586b970c87c61d9e4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.0.0 <=711f8c3fb3db61897080468586b970c87c61d9e4

Published CVSS scores

8.1Oracle LinuxCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
8.1NISTCVSS: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.

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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
T1210Exploitation of Remote Services

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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