#VU112223 Improper locking in Linux kernel - CVE-2025-38099

Vulnerability identifier: #VU112223

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-38099

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the hci_cc_read_buffer_size() function in net/bluetooth/hci_event.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/14d17c78a4b1660c443bae9d38c814edea506f62
https://git.kernel.org/stable/c/ec1f015ec0c6fd250a6564e8452f7bb3160b9cb1
https://git.kernel.org/stable/c/f48ee562c095e552a30b8d9cc0566a267b410f8a

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?