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().

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR 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:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82 cve-icon cve-icon
https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8 cve-icon cve-icon
https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429ce cve-icon cve-icon
https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799f cve-icon cve-icon
https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1 cve-icon cve-icon
https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0 cve-icon cve-icon
https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9 cve-icon cve-icon
https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024022603-CVE-2021-46906-636c@gregkh/ cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-46906 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-46906 cve-icon
History

Thu, 19 Dec 2024 08:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 11 Sep 2024 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 11 Sep 2024 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-10T07:09:03.572Z

Reserved: 2024-02-25T13:45:52.717Z

Link: CVE-2021-46906

cve-icon Vulnrichment

Updated: 2024-08-04T05:17:42.969Z

cve-icon NVD

Status : Modified

Published: 2024-02-26T18:15:07.160

Modified: 2025-12-10T07:15:55.080

Link: CVE-2021-46906

cve-icon Redhat

Severity : Low

Publid Date: 2024-02-26T00:00:00Z

Links: CVE-2021-46906 - Bugzilla