Denial of service in Linux kernel bluetooth

1) Memory leak

EUVDB-ID: #VU62484

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26878

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak within the drivers/bluetooth/virtio_bt.c file in the Linux kernel. A local user can trigger leak memory and perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.16.3

External links

http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1d0688421449718c6c5f46e458a378c9b530ba18
http://lore.kernel.org/linux-bluetooth/1A203F5E-FB5E-430C-BEA3-86B191D69D58@holtmann.org/
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.17
http://www.openwall.com/lists/oss-security/2022/03/11/1

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.