Memory leak in Linux kernel vmw_vsock

1) Memory leak

EUVDB-ID: #VU90033

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-2021-47024

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 virtio_transport_reset_no_sock(), virtio_transport_do_close() and virtio_transport_close() functions in net/vmw_vsock/virtio_transport_common.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/b605673b523fe33abeafb2136759bcbc9c1e6ebf
https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a
https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b
https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39

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.