CVE-2021-46906

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-46906
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46906.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-46906
Related
Published
2024-02-26T18:15:07Z
Modified
2024-09-18T01:00:21Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

HID: usbhid: fix info leak in hidsubmitctrl

In hidsubmitctrl(), 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 hidsubmitctrl) to calculate transferbufferlength 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 hidreportlen() to account for the zero report size case by using DIVROUNDUP for the division. Then, call it from hidsubmitctrl().

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.46-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.14.6-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.14.6-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}