Linux Kernel up to 6.5.2 Bluetooth hci_remove_ltk/hci_remove_irk use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.10.194/5.15.131/6.1.52/6.4.15/6.5.2. It has been rated as critical. This affects the function hci_remove_ltk/hci_remove_irk of the component Bluetooth. Performing a manipulation results in use after free. This vulnerability is cataloged as CVE-2023-53386. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.10.194/5.15.131/6.1.52/6.4.15/6.5.2. This affects the function hci_remove_ltk/hci_remove_irk of the component Bluetooth. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix potential use-after-free when clear keys Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu() call.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53386 since 09/17/2025. The exploitability is told to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/11/2025).

The vulnerability scanner Nessus provides a plugin with the ID 265607 (Linux Distros Unpatched Vulnerability : CVE-2023-53386), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.195, 5.15.132, 6.1.53, 6.4.16 or 6.5.3 eliminates this vulnerability. Applying the patch e87da6a0ac6e631454e7da53a76aa9fe44aaa5dd/942d8cefb022f384d5424f8b90c7878f3f93726f/94617b736c25091b60e514e2e7aeafcbbee6b700/da19f35868dfbecfff4f81166c054d2656cb1be4/35cc42f04bc49f0656f6840cb7451b3df6049649/3673952cf0c6cf81b06c66a0b788abeeb02ff3ae is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (265607) and CERT Bund (WID-SEC-2025-2092). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265607
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53386

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.195/5.15.132/6.1.53/6.4.16/6.5.3
Patch: e87da6a0ac6e631454e7da53a76aa9fe44aaa5dd/942d8cefb022f384d5424f8b90c7878f3f93726f/94617b736c25091b60e514e2e7aeafcbbee6b700/da19f35868dfbecfff4f81166c054d2656cb1be4/35cc42f04bc49f0656f6840cb7451b3df6049649/3673952cf0c6cf81b06c66a0b788abeeb02ff3ae

Timelineinfo

09/17/2025 CVE reserved
09/18/2025 +1 days Advisory disclosed
09/18/2025 +0 days VulDB entry created
12/11/2025 +84 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53386 (🔒)
GCVE (CVE): GCVE-0-2023-53386
GCVE (VulDB): GCVE-100-324849
CERT Bund: WID-SEC-2025-2092 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 09/18/2025 16:22
Updated: 12/11/2025 23:37
Changes: 09/18/2025 16:22 (59), 09/20/2025 12:33 (7), 09/21/2025 21:58 (2), 11/29/2025 16:28 (1), 12/11/2025 23:37 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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