Improper locking in Linux kernel powerpc kernel

1) Improper locking

EUVDB-ID: #VU104659

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49440

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the enter_rtas() function in arch/powerpc/kernel/rtas.c, within the _GLOBAL() function in arch/powerpc/kernel/entry_64.S. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/5ca40fcf0da0ce2b5bc44e7d8b036535955f2e3d
https://git.kernel.org/stable/c/5f4367448f6817c8a0e94dc9736ed84fa8eee4a3
https://git.kernel.org/stable/c/b6b1c3ce06ca438eb24e0f45bf0e63ecad0369f5
https://git.kernel.org/stable/c/c9c41f0273826a13ac93124e66a4ff45df281ba0

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.