CVE-2021-47413

usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle

Published May 21, 2024 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
In the Linux kernel, the following vulnerability has been resolved:

usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle

When passing 'phys' in the devicetree to describe the USB PHY phandle
(which is the recommended way according to
Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt) the
following NULL pointer dereference is observed on i.MX7 and i.MX8MM:

[ 1.489344] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098
[ 1.498170] Mem abort info:
[ 1.500966] ESR = 0x96000044
[ 1.504030] EC = 0x25: DABT (current EL), IL = 32 bits
[ 1.509356] SET = 0, FnV = 0
[ 1.512416] EA = 0, S1PTW = 0
[ 1.515569] FSC = 0x04: level 0 translation fault
[ 1.520458] Data abort info:
[ 1.523349] ISV = 0, ISS = 0x00000044
[ 1.527196] CM = 0, WnR = 1
[ 1.530176] [0000000000000098] user address but active_mm is swapper
[ 1.536544] Internal error: Oops: 96000044 [#1] PREEMPT SMP
[ 1.542125] Modules linked in:
[ 1.545190] CPU: 3 PID: 7 Comm: kworker/u8:0 Not tainted 5.14.0-dirty #3
[ 1.551901] Hardware name: Kontron i.MX8MM N801X S (DT)
[ 1.557133] Workqueue: events_unbound deferred_probe_work_func
[ 1.562984] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
[ 1.568998] pc : imx7d_charger_detection+0x3f0/0x510
[ 1.573973] lr : imx7d_charger_detection+0x22c/0x510

This happens because the charger functions check for the phy presence
inside the imx_usbmisc_data structure (data->usb_phy), but the chipidea
core populates the usb_phy passed via 'phys' inside 'struct ci_hdrc'
(ci->usb_phy) instead.

This causes the NULL pointer dereference inside imx7d_charger_detection().

Fix it by also searching for 'phys' in case 'fsl,usbphy' is not found.

Tested on a imx7s-warp board.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
Metrics ssvc

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
Linux
Published
Updated
May 11, 2026, 1:54 PM
Reserved
May 21, 2024, 2:58 PM
Status
Analyzed
Published
May 21, 2024, 3:15 PM
Modified
Jun 17, 2026, 4:17 AM
Severity
Low
Public date
May 21, 2024, 12:00 AM