Memory leak in Linux kernel cpu mce

1) Memory leak

EUVDB-ID: #VU104309

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-2022-49549

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 kfree(), mce_threshold_remove_device() and mce_threshold_create_device() functions in arch/x86/kernel/cpu/mce/amd.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/396b8e7ab2a99ddac57d3522b3da5e58cb608d37
https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616
https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6
https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e
https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0

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.