#VU104357 Memory leak in Linux kernel - CVE-2022-49064

Vulnerability identifier: #VU104357

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49064

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to memory leak within the __cachefiles_unmark_inode_in_use(), cachefiles_unmark_inode_in_use(), cachefiles_create_tmpfile() and cachefiles_open_file() functions in fs/cachefiles/namei.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.17, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12, 5.17.1, 5.17.2, 5.17.3, 5.18 rc1, 5.18 rc2, 5.18 rc3, 5.18 rc5, 5.18 rc6, 5.18 rc7, 5.18 rc8

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External links
https://git.kernel.org/stable/c/b2055abafd3d4ee0376fb3eed5cae866316995a1
https://git.kernel.org/stable/c/ea5dc046127e857a7873ae55fd57c866e9e86fb2
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18

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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.