CVE-2023-53527: thunderbolt: Fix memory leak in tb_handle_dp_bandwidth_request()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-01 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Fix memory leak in tb_handle_dp_bandwidth_request() The memory allocated in tb_queue_dp_bandwidth_request() needs to be released once the request is handled to avoid leaking it.

Affected products

Linux kernel: from 6.3 before 6.4.11; 6.5-rc1, 6.5-rc2, 6.5-rc3, 6.5-rc4, 6.5-rc5 — fixed in 6.4.11

How to fix

Upgrade to a fixed version: Linux kernel 6.4.11. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0752bb32aed2c5dd85821195a507a1079c4835f7
https://git.kernel.org/stable/c/596a5123cc782d458b057eb3837e66535cd0befa

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