Input validation error in Linux kernel s390 block driver

1) Input validation error

EUVDB-ID: #VU93690

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-2021-47176

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation within the dasd_fba_setup_blk_queue() function in drivers/s390/block/dasd_fba.c, within the dasd_diag_setup_blk_queue() function in drivers/s390/block/dasd_diag.c. 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

External links

http://git.kernel.org/stable/c/6a16810068e70959bc1df686424aa35ce05578f1
http://git.kernel.org/stable/c/aa8579bc084673c651204f7cd0d6308a47dffc16
http://git.kernel.org/stable/c/a16be88a3d7e5efcb59a15edea87a8bd369630c6
http://git.kernel.org/stable/c/c0c8a8397fa8a74d04915f4d3d28cb4a5d401427

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.