CVE

CVE-2021-46906

Severity:
MEDIUM
Type:
Unavailable / Other
Publication date:
26/02/2024
Last modified:
17/04/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> HID: usbhid: fix info leak in hid_submit_ctrl<br /> <br /> In hid_submit_ctrl(), the way of calculating the report length doesn&amp;#39;t<br /> take into account that report-&gt;size can be zero. When running the<br /> syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to<br /> calculate transfer_buffer_length as 16384. When this urb is passed to<br /> the usb core layer, KMSAN reports an info leak of 16384 bytes.<br /> <br /> To fix this, first modify hid_report_len() to account for the zero<br /> report size case by using DIV_ROUND_UP for the division. Then, call it<br /> from hid_submit_ctrl().

Impact

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

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

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:*:*:*:*:*:*:*:* 4.4.274 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.5.0 (including) 4.9.274 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.10.0 (including) 4.14.238 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.15.0 (including) 4.19.196 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.20.0 (including) 5.4.127 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5.0 (including) 5.10.45 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11.0 (including) 5.12.12 (excluding)

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


References to Advisories, Solutions, and Tools