CVE-2023-53293

Kernel Oops via unchecked Bluetooth metadata pointer

Published Sep 16, 2025 · Updated Sep 16, 2025

A NULL pointer dereference in Linux Kernel btrtl_set_quirks allows local users to trigger a Kernel Oops while probing unsupported controllers. The function reads btrtl_dev->ic_info->lmp_subver without first confirming that ic_info was populated for the attached Realtek Bluetooth device. The fault requires locally installing or probing an unsupported controller and interrupts the host, but the Linux CNA later withdrew this CVE identifier.

CVSS severity5.5
Medium
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

A NULL pointer dereference in Linux Kernel btrtl_set_quirks allows local users to trigger a Kernel Oops while probing unsupported controllers. The function reads btrtl_dev->ic_info->lmp_subver without first confirming that ic_info was populated for the attached Realtek Bluetooth device. The fault requires locally installing or probing an unsupported controller and interrupts the host, but the Linux CNA later withdrew this CVE identifier.

The record

CVE
CVE-2023-53293
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <253cf30e8d3d001850a95c4729d668f916b037ab
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c34722f0bb9f7efb0e7e7a75a9cb57601132b51f
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ea160ece08668a30ce69f92cc08e87da54a64a9c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <253cf30e8d3d001850a95c4729d668f916b037ab; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c34722f0bb9f7efb0e7e7a75a9cb57601132b51f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ea160ece08668a30ce69f92cc08e87da54a64a9c

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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