cbcvebase.
CVE-2022-50370
published 2025-09-17

CVE-2022-50370: In the Linux kernel, the following vulnerability has been resolved: i2c: designware: Fix handling of real but unexpected device interrupts Commit c7b79a752871…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.19%
8.8th percentile
In the Linux kernel, the following vulnerability has been resolved: i2c: designware: Fix handling of real but unexpected device interrupts Commit c7b79a752871 ("mfd: intel-lpss: Add Intel Alder Lake PCH-S PCI IDs") caused a regression on certain Gigabyte motherboards for Intel Alder Lake-S where system crashes to NULL pointer dereference in i2c_dw_xfer_msg() when system resumes from S3 sleep state ("deep"). I was able to debug the issue on Gigabyte Z690 AORUS ELITE and made following notes: - Issue happens when resuming from S3 but not when resuming from "s2idle" - PCI device 00:15.0 == i2c_designware.0 is already in D0 state when system enters into pci_pm_resume_noirq() while all other i2c_designware PCI devices are in D3. Devices were runtime suspended and in D3 prior entering into suspend - Interrupt comes after pci_pm_resume_noirq() when device interrupts are re-enabled - According to register dump the interrupt really comes from the i2c_designware.0. Controller is enabled, I2C target address register points to a one detectable I2C device address 0x60 and the DW_IC_RAW_INTR_STAT register START_DET, STOP_DET, ACTIVITY and TX_EMPTY bits are set indicating completed I2C transaction. My guess is that the firmware uses this controller to communicate with an on-board I2C device during resume but does not disable the controller before giving control to an operating system. I was told the UEFI update fixes this but never the less it revealed the driver is not ready to handle TX_EMPTY (or RX_FULL) interrupt when device is supposed to be idle and state variables are not set (especially the dev->msgs pointer which may point to NULL or stale old data). Introduce a new software status flag STATUS_ACTIVE indicating when the controller is active in driver point of view. Now treat all interrupts that occur when is not set as unexpected and mask all interrupts from the controller.

Affected

12 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.3-1 (bookworm)linux 6.0.3-1 (bookworm)
linuxlinux——
linuxlinux>= c7b79a75287141cef5bbaeaf1c942269c08cd52e < 7fa5304c4b5b425d4a0b3acf10139a7f6108a85f7fa5304c4b5b425d4a0b3acf10139a7f6108a85f
linuxlinux>= c7b79a75287141cef5bbaeaf1c942269c08cd52e < a206f7fbe9589c60fafad12884628c909ecb042fa206f7fbe9589c60fafad12884628c909ecb042f
linuxlinux>= c7b79a75287141cef5bbaeaf1c942269c08cd52e < aa59ac81e859006d3a1df035a19b3f2089110f93aa59ac81e859006d3a1df035a19b3f2089110f93
linuxlinux>= c7b79a75287141cef5bbaeaf1c942269c08cd52e < 301c8f5c32c8fb79c67539bc23972dc3ef48024c301c8f5c32c8fb79c67539bc23972dc3ef48024c
linuxlinux_kernel>= 0 < 6.0.3-16.0.3-1
linuxlinux_kernel>= 0 < 6.0.3-16.0.3-1
linuxlinux_kernel>= 0 < 6.0.3-16.0.3-1
linuxlinux_kernel>= 5.12 < 5.15.755.15.75
linuxlinux_kernel>= 5.16 < 5.19.175.19.17
linuxlinux_kernel>= 6.0 < 6.0.36.0.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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