Memory leak in Linux kernel kvm svm

1) Memory leak

EUVDB-ID: #VU104311

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-2022-49556

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 sev_launch_measure() and __sev_dbg_decrypt_user() functions in arch/x86/kvm/svm/sev.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/401bef1f95de92c3a8c6eece46e02fa88d7285ee
https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93
https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0
https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403
https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418

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.