Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47024

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
28/02/2024
Last modified:
06/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> vsock/virtio: free queued packets when closing socket<br /> <br /> As reported by syzbot [1], there is a memory leak while closing the<br /> socket. We partially solved this issue with commit ac03046ece2b<br /> ("vsock/virtio: free packets during the socket release"), but we<br /> forgot to drain the RX queue when the socket is definitely closed by<br /> the scheduled work.<br /> <br /> To avoid future issues, let&amp;#39;s use the new virtio_transport_remove_sock()<br /> to drain the RX queue before removing the socket from the af_vsock lists<br /> calling vsock_remove_sock().<br /> <br /> [1] https://syzkaller.appspot.com/bug?extid=24452624fc4c571eedd9

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.2 (including) 5.10.37 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.11.21 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.12 (including) 5.12.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools