CVE-2023-53561
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-03-21

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: wwan: iosm: fix NULL pointer dereference when removing device In suspend and resume cycle, the removal and rescan of device ends up in NULL pointer dereference. During driver initialization, if the ipc_imem_wwan_channel_init() fails to get the valid device capabilities it returns an error and further no resource (wwan struct) will be allocated. Now in this situation if driver removal procedure is initiated it would result in NULL pointer exception since unallocated wwan struct is dereferenced inside ipc_wwan_deinit(). ipc_imem_run_state_worker() to handle the called functions return value and to release the resource in failure case. It also reports the link down event in failure cases. The user space application can handle this event to do a device reset for restoring the device communication.
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Meta Information
Published
2025-10-04
Last Modified
2026-03-21
Generated
2026-05-07
AI Q&A
2025-10-04
EPSS Evaluated
2026-05-05
NVD
CVE-2023-53561
EUVD
EUVD-2025-32320
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.4
linux linux_kernel 6.4
linux linux_kernel From 6.2 (inc) to 6.3.4 (exc)
linux linux_kernel From 5.14 (inc) to 6.1.30 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a NULL pointer dereference in the Linux kernel's wwan iosm driver that occurs during the suspend and resume cycle. Specifically, if the driver initialization fails to allocate necessary resources due to invalid device capabilities, the driver removal procedure later attempts to dereference a NULL pointer, causing a crash or malfunction. The fix involves handling failure cases properly to avoid dereferencing unallocated structures and reporting link down events so user space applications can reset the device communication.


How can this vulnerability impact me? :

This vulnerability can cause the Linux kernel to crash or malfunction during device removal in suspend/resume cycles, potentially leading to system instability or denial of service. It may disrupt device communication until the device is reset by user space applications.


What immediate steps should I take to mitigate this vulnerability?

To mitigate this vulnerability, ensure that your Linux kernel is updated to a version where the fix for the NULL pointer dereference in the wwan iosm driver is applied. Additionally, monitor user space applications for link down events reported by ipc_imem_run_state_worker(), which can be handled to reset the device and restore communication.


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