Linux Kernel up to 6.3.1 btsdio btsdio_remove use after free

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.6$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.3.1. This vulnerability affects the function btsdio_remove of the component btsdio. Such manipulation leads to use after free. This vulnerability is traded as CVE-2023-54197. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.3.1. Affected by this issue is the function btsdio_remove of the component btsdio. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work" This reverts commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f. This patch introduces a possible null-ptr-def problem. Revert it. And the fixed bug by this patch have resolved by commit 73f7b171b7c0 ("Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition").

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2023-54197 since 12/30/2025. The exploitation is known to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/26/2026).

The vulnerability scanner Nessus provides a plugin with the ID 281512 (Linux Distros Unpatched Vulnerability : CVE-2023-54197), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.315, 4.19.283, 5.4.243, 5.10.180, 5.15.111, 6.1.28, 6.2.15 or 6.3.2 eliminates this vulnerability. Applying the patch 3b4ed52009723f7dfca7a8ca95163bfb441bfb76/70a104588e3131415e559c06deb834ce259a285a/de0ffb5145c9f418ad76f00e58d4b91c680410b2/0837d10f6c37a47a0c73bccf1e39513613a2fcc2/a789192f366147a0fbb395650079906d1d04e0b9/952030c914b5f2288609efe868537afcff7a3f51/8f83fa62614c282dd5d1211a0dd99c6a0a515b81/d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3/db2bf510bd5d57f064d9e1db395ed86a08320c54 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 (281512) and CERT Bund (WID-SEC-2025-2941). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • IBM Power Hardware Management Console
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • IBM DataPower Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

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

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

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

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 281512
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-54197

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.315/4.19.283/5.4.243/5.10.180/5.15.111/6.1.28/6.2.15/6.3.2
Patch: 3b4ed52009723f7dfca7a8ca95163bfb441bfb76/70a104588e3131415e559c06deb834ce259a285a/de0ffb5145c9f418ad76f00e58d4b91c680410b2/0837d10f6c37a47a0c73bccf1e39513613a2fcc2/a789192f366147a0fbb395650079906d1d04e0b9/952030c914b5f2288609efe868537afcff7a3f51/8f83fa62614c282dd5d1211a0dd99c6a0a515b81/d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3/db2bf510bd5d57f064d9e1db395ed86a08320c54

Timelineinfo

12/30/2025 Advisory disclosed
12/30/2025 +0 days CVE reserved
12/30/2025 +0 days VulDB entry created
04/26/2026 +117 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-54197 (🔒)
GCVE (CVE): GCVE-0-2023-54197
GCVE (VulDB): GCVE-100-338924
CERT Bund: WID-SEC-2025-2941 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/30/2025 16:29
Updated: 04/26/2026 14:41
Changes: 12/30/2025 16:29 (59), 12/31/2025 21:33 (2), 01/01/2026 07:31 (7), 04/26/2026 14:41 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!