Vulnerability Details : CVE-2021-46906
In the Linux kernel, the following vulnerability has been resolved:
HID: usbhid: fix info leak in hid_submit_ctrl
In hid_submit_ctrl(), the way of calculating the report length doesn't
take into account that report->size can be zero. When running the
syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to
calculate transfer_buffer_length as 16384. When this urb is passed to
the usb core layer, KMSAN reports an info leak of 16384 bytes.
To fix this, first modify hid_report_len() to account for the zero
report size case by using DIV_ROUND_UP for the division. Then, call it
from hid_submit_ctrl().
Products affected by CVE-2021-46906
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-46906
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 11 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-46906
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.8
|
3.6
|
NIST | 2024-04-17 |
CWE ids for CVE-2021-46906
-
The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-46906
-
https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429ce
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799f
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1
HID: usbhid: fix info leak in hid_submit_ctrl - kernel/git/stable/linux.git - Linux kernel stable treePatch
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