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CVE-2023-52749
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MITRE ATT&CK
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Description
In the Linux kernel, the following vulnerability has been resolved:
spi: Fix null dereference on suspend
A race condition exists where a synchronous (noqueue) transfer can be
active during a system suspend. This can cause a null pointer
dereference exception to occur when the system resumes.
Example order of events leading to the exception:
- spi_sync() calls __spi_transfer_message_noqueue() which sets
ctlr->cur_msg
- Spi transfer begins via spi_transfer_one_message()
- System is suspended interrupting the transfer context
- System is resumed
- spi_controller_resume() calls spi_start_queue() which resets cur_msg
to NULL
- Spi transfer context resumes and spi_finalize_current_message() is
called which dereferences cur_msg (which is now NULL)
Wait for synchronous transfers to complete before suspending by
acquiring the bus mutex and setting/checking a suspend flag.
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Vendors
- Linux
Products
- Linux
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Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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