#VU104471 Use-after-free in Linux kernel - CVE-2022-49111

Vulnerability identifier: #VU104471

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49111

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hci_disconn_phylink_complete_evt() function in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/2cc803804ec9a296b3156855d6c8c4ca1c6b84be
https://git.kernel.org/stable/c/3803d896ddd97c7c16689a5381c0960040727647
https://git.kernel.org/stable/c/4da302b90b96c309987eb9b37c8547f939f042d2
https://git.kernel.org/stable/c/643a6c26bd32e339d00ad97b8822b6db009e803c
https://git.kernel.org/stable/c/684e505406abaeabe0058e9776f9210bf2747953
https://git.kernel.org/stable/c/b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502
https://git.kernel.org/stable/c/c41de54b0a963e59e4dd04c029a4a6d73f45ef9c
https://git.kernel.org/stable/c/d404765dffdbd8dcd14758695d0c96c52fb2e624
https://git.kernel.org/stable/c/f63d24baff787e13b723d86fe036f84bdbc35045

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.