Use-after-free in Linux kernel misc driver

1) Use-after-free

EUVDB-ID: #VU96329

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48872

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 fastrpc_map_put() function in drivers/misc/fastrpc.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/556dfdb226ce1e5231d8836159b23f8bb0395bf4
http://git.kernel.org/stable/c/b171d0d2cf1b8387c72c8d325c5d5746fa271e39
http://git.kernel.org/stable/c/61a0890cb95afec5c8a2f4a879de2b6220984ef1
http://git.kernel.org/stable/c/079c78c68714f7d8d58e66c477b0243b31806907
http://git.kernel.org/stable/c/96b328d119eca7563c1edcc4e1039a62e6370ecb

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.