CVE-2026-23151
Unknown Unknown - Not Provided
Memory Leak in Linux Kernel Bluetooth MGMT set_ssp_complete

Publication date: 2026-02-14

Last updated on: 2026-05-17

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix memory leak in set_ssp_complete Fix memory leak in set_ssp_complete() where mgmt_pending_cmd structures are not freed after being removed from the pending list. Commit 302a1f674c00 ("Bluetooth: MGMT: Fix possible UAFs") replaced mgmt_pending_foreach() calls with individual command handling but missed adding mgmt_pending_free() calls in both error and success paths of set_ssp_complete(). Other completion functions like set_le_complete() were fixed correctly in the same commit. This causes a memory leak of the mgmt_pending_cmd structure and its associated parameter data for each SSP command that completes. Add the missing mgmt_pending_free(cmd) calls in both code paths to fix the memory leak. Also fix the same issue in set_advertising_complete().
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Meta Information
Published
2026-02-14
Last Modified
2026-05-17
Generated
2026-06-16
AI Q&A
2026-02-14
EPSS Evaluated
2026-06-14
NVD
CVE-2026-23151
EUVD
EUVD-2026-5889
Affected Vendors & Products
Showing 11 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 6.12.59 (inc) to 6.12.69 (exc)
linux linux_kernel From 6.16.10 (inc) to 6.17 (exc)
linux linux_kernel From 6.17.1 (inc) to 6.18.9 (exc)
linux linux_kernel 6.17
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
Attack-Flow Graph
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Executive Summary

This vulnerability is a memory leak in the Linux kernel's Bluetooth management code, specifically in the set_ssp_complete() function.

The issue occurs because mgmt_pending_cmd structures are not freed after being removed from the pending list, causing memory to be consumed unnecessarily.

A previous commit replaced certain function calls but missed adding the necessary free calls in both error and success paths of set_ssp_complete(), leading to this leak.

The fix involves adding the missing mgmt_pending_free(cmd) calls to properly release memory and also correcting the same issue in set_advertising_complete().

Impact Analysis

This vulnerability can cause a memory leak in the Linux kernel's Bluetooth management system.

Over time, the leak could lead to increased memory consumption, potentially degrading system performance or causing instability.

In environments with heavy Bluetooth usage, this could result in resource exhaustion or crashes if the leak is not addressed.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

The vulnerability is a memory leak in the Linux kernel's Bluetooth MGMT subsystem related to the set_ssp_complete function.

To mitigate this vulnerability, you should update your Linux kernel to a version that includes the fix which adds the missing mgmt_pending_free(cmd) calls in both error and success paths of set_ssp_complete and set_advertising_complete functions.

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