CVE-2023-54164

Kernel memory corruption via unlocked ISO connection access

Published Dec 30, 2025 · Updated Dec 30, 2025

Use-after-free in Bluetooth ISO sockets in affected Linux kernel 6.1 and 6.2 through 6.4 builds allows local users to corrupt kernel memory. ISO socket state and iso_pi(sk)->conn are accessed without lock_sock, allowing iso_conn_del to free iso_conn during connection or I/O paths. An unprivileged process can create the socket and, with asynchronous Bluetooth events, obtain kernel read or write primitives or panic the host.

CVSS severity8.0
High
EPSS probability0.28%
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 Bluetooth ISO sockets in affected Linux kernel 6.1 and 6.2 through 6.4 builds allows local users to corrupt kernel memory. ISO socket state and iso_pi(sk)->conn are accessed without lock_sock, allowing iso_conn_del to free iso_conn during connection or I/O paths. An unprivileged process can create the socket and, with asynchronous Bluetooth events, obtain kernel read or write primitives or panic the host.

The record

CVE
CVE-2023-54164
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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=241f51931c35085449502c10f64fb3ecd6e02171 <88ad50f2b843a510bd7c922c0a4e2484aff9d645
  2. Affected versionversion=241f51931c35085449502c10f64fb3ecd6e02171 <d40ae85ee62e3666f45bc61864b22121346f88ef
  3. Affected versionversion=2539cbc625c560d5432e2f0fc04bfe4a889cf737
  4. Affected versionversion=6.2
  5. Affected versionversion=c524f9561c657b8af26dd4f67092b8928261aa62 <e969bfed84c1f88dc722a678ee08488e86f0ec1a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=241f51931c35085449502c10f64fb3ecd6e02171 <88ad50f2b843a510bd7c922c0a4e2484aff9d645; version=241f51931c35085449502c10f64fb3ecd6e02171 <d40ae85ee62e3666f45bc61864b22121346f88ef; version=2539cbc625c560d5432e2f0fc04bfe4a889cf737; version=6.2; version=c524f9561c657b8af26dd4f67092b8928261aa62 <e969bfed84c1f88dc722a678ee08488e86f0ec1a

Published CVSS scores

8.0LinuxCVSS:3.1/AV:A/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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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