Linux Kernel up to 6.4.11 Bluetooth l2cap_le_command_rej use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.4.11. This affects the function l2cap_le_command_rej of the component Bluetooth. The manipulation results in use after free. This vulnerability is identified as CVE-2023-53305. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.4.11. It has been classified as critical. Affected is the function l2cap_le_command_rej 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free Fix potential use-after-free in l2cap_le_command_rej.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2023-53305 since 09/16/2025. The exploitability is told to be easy. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/23/2026).

The vulnerability scanner Nessus provides a plugin with the ID 265300 (Linux Distros Unpatched Vulnerability : CVE-2023-53305), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.128, 6.1.47 or 6.4.12 eliminates this vulnerability. Applying the patch e76bab1b7afa580cd76362540fc37551ada4359b/1a40c56e8bff3e424724d78a9a6b3272dd8a371d/fe49aa73cca6608714477b74bfc6874b9db979df/2958cf9f805b9f0bdc4a761bf6ea281eb8d44f8e/548a6b64b3c0688f01119a6fcccceb41f8c984e4/149daab45922ab1ac7f0cbeacab7251a46bf5e63/255be68150291440657b2cdb09420b69441af3d8/f752a0b334bb95fe9b42ecb511e0864e2768046f 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 (265300) and CERT Bund (WID-SEC-2025-2077). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

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

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: 265300
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53305

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.324/4.19.293/5.4.255/5.10.192/5.15.128/6.1.47/6.4.12
Patch: e76bab1b7afa580cd76362540fc37551ada4359b/1a40c56e8bff3e424724d78a9a6b3272dd8a371d/fe49aa73cca6608714477b74bfc6874b9db979df/2958cf9f805b9f0bdc4a761bf6ea281eb8d44f8e/548a6b64b3c0688f01119a6fcccceb41f8c984e4/149daab45922ab1ac7f0cbeacab7251a46bf5e63/255be68150291440657b2cdb09420b69441af3d8/f752a0b334bb95fe9b42ecb511e0864e2768046f

Timelineinfo

09/16/2025 Advisory disclosed
09/16/2025 +0 days CVE reserved
09/16/2025 +0 days VulDB entry created
02/23/2026 +160 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53305 (🔒)
GCVE (CVE): GCVE-0-2023-53305
GCVE (VulDB): GCVE-100-324546
CERT Bund: WID-SEC-2025-2077 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 09/16/2025 20:43
Updated: 02/23/2026 10:57
Changes: 09/16/2025 20:43 (59), 09/17/2025 14:52 (2), 10/21/2025 04:42 (7), 12/02/2025 00:06 (11), 12/27/2025 08:27 (1), 02/23/2026 10:57 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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