Use-after-free in Linux kernel mctp

1) Use-after-free

EUVDB-ID: #VU94427

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-2022-48782

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 mctp_route_input() function in net/mctp/route.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.16 - 5.17 rc12

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.16:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16:rc8:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.16.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/1dd3ecbec5f606b2a526c47925c8634b1a6bb81e
https://git.kernel.org/stable/c/7e5b6a5c8c44310784c88c1c198dde79f6402f7b
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.11
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17

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.