CVE-2023-53827
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp} Similar to commit d0be8347c623 ("Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put"), just use l2cap_chan_hold_unless_zero to prevent referencing a channel that is about to be destroyed.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53827
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's Bluetooth L2CAP component, specifically in the l2cap_disconnect request and response handling. It occurs when the code references a Bluetooth channel that is about to be destroyed, potentially leading to memory corruption or crashes. The fix involves using a function to hold the channel reference unless it is zero, preventing access to freed memory.

Impact Analysis

This vulnerability can lead to instability or crashes in the Linux kernel's Bluetooth subsystem, potentially causing denial of service or unexpected behavior in Bluetooth communications. Exploiting this could allow an attacker to disrupt Bluetooth connectivity or cause kernel memory corruption.

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