#VU104308 Memory leak in Linux kernel - CVE-2022-49546

Vulnerability identifier: #VU104308

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-2022-49546

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 machine_kexec() function in arch/x86/kernel/machine_kexec_64.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.18, 5.18 rc1, 5.18 rc2, 5.18 rc3, 5.18 rc5, 5.18 rc6, 5.18 rc7, 5.18 rc8, 5.18.1, 5.18.2

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External links
https://git.kernel.org/stable/c/115ee42a4c2f26ba2b4ace2668a3f004621f6833
https://git.kernel.org/stable/c/8765a423a87d74ef24ea02b43b2728fe4039f248
https://git.kernel.org/stable/c/b3e34a47f98974d0844444c5121aaff123004e57
https://git.kernel.org/stable/c/f675e3a9189d84a9324ab45b0cb19906c2bc8fcb
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.3

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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.