Denial of service in Linux kernel parisc

1) Improper handling of exceptional conditions

EUVDB-ID: #VU89265

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2021-46928

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

Exploit availability: No

Description

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

The vulnerability exists due to improper handling of errors within the handle_interruption() function in arch/parisc/kernel/traps.c. A local user can send specially crafted input and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/d01e9ce1af6116f812491d3d3873d204f10ae0b8
http://git.kernel.org/stable/c/e96373f0a5f484bc1e193f9951dcb3adf24bf3f7
http://git.kernel.org/stable/c/484730e5862f6b872dca13840bed40fd7c60fa26

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.