Local denial of service in Linux Kernel netdevsim

1) Improper update of reference count

EUVDB-ID: #VU75101

Risk: Low

CVSSv3.1: 3.6 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-2019

CWE-ID: CWE-911 - Improper Update of Reference Count

Exploit availability: No

Description

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

The vulnerability exists due to improper update of reference count within the scheduling of events in drivers/net/netdevsim/fib.c. A local privileged user can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://www.zerodayinitiative.com/advisories/ZDI-23-442/
http://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=180a6a3ee60a

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.