Memory leak in Linux kernel watchdog driver

1) Memory leak

EUVDB-ID: #VU104261

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49373

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the ts4800_wdt_probe() function in drivers/watchdog/ts4800_wdt.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

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

External links

https://git.kernel.org/stable/c/5b110d940417942bc87d9e4bea6d4f24e05ed483
https://git.kernel.org/stable/c/5d24df3d690809952528e7a19a43d84bc5b99d44
https://git.kernel.org/stable/c/7a4afd8a003d6abf1f5d159c2bb67e6b7cbde253
https://git.kernel.org/stable/c/910b1cdf6c50ae8fb222e46657d04fb181577017
https://git.kernel.org/stable/c/91fa5aa53f68b85e779164b3127c7e23cad5c457
https://git.kernel.org/stable/c/f067b5286edfd83d2d3903e8578b561599d62539

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.