Stack-based buffer overflow in Linux kernel powerpc kvm

1) Stack-based buffer overflow

EUVDB-ID: #VU91296

Risk: Low

CVSSv3.1: 4.8 [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-2021-47465

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to stack overflow within the _GLOBAL() and REST_NVGPRS() functions in arch/powerpc/kvm/book3s_hv_rmhandlers.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

http://git.kernel.org/stable/c/80bbb0bc3a0288442f7fe6fc514f4ee1cb06ccb7
http://git.kernel.org/stable/c/fbd724c49bead048ae9fc1a5b7bff2fb3e54f855
http://git.kernel.org/stable/c/6d077c37c4643394b1bae9682da48164fc147ea8
http://git.kernel.org/stable/c/9b4416c5095c20e110c82ae602c254099b83b72f

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.