Use-after-free in Linux kernel bluetooth

1) Use-after-free

EUVDB-ID: #VU108230

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-2022-49910

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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 l2cap_rx_state_recv(), l2cap_rx() and l2cap_stream_rx() functions in net/bluetooth/l2cap_core.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.9 - 4.9.332

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.8:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/03af22e23b96fb7ef75fb7885407ef457e8b403d
https://git.kernel.org/stable/c/3aff8aaca4e36dc8b17eaa011684881a80238966
https://git.kernel.org/stable/c/4cd094fd5d872862ca278e15b9b51b07e915ef3f
https://git.kernel.org/stable/c/6c7407bfbeafc80a04e6eaedcf34d378532a04f2
https://git.kernel.org/stable/c/8278a87bb1eeea94350d675ef961ee5a03341fde
https://git.kernel.org/stable/c/9a04161244603f502c6e453913e51edd59cb70c1
https://git.kernel.org/stable/c/cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569
https://git.kernel.org/stable/c/dc30e05bb18852303084430c03ca76e69257d9ea
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.333

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.