CVE-2023-52749
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.
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
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: 1. spi_sync() calls __spi_transfer_message_noqueue() which sets ctlr->cur_msg 2. Spi transfer begins via spi_transfer_one_message() 3. System is suspended interrupting the transfer context 4. System is resumed 6. spi_controller_resume() calls spi_start_queue() which resets cur_msg to NULL 7. 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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362, CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/4ec4508db97502a12daee88c74782e8d35ced068Patch
- https://git.kernel.org/stable/c/96474ea47dc67b0704392d59192b233c8197db0ePatch
- https://git.kernel.org/stable/c/bef4a48f4ef798c4feddf045d49e53c8a97d5e37Patch
- https://git.kernel.org/stable/c/4ec4508db97502a12daee88c74782e8d35ced068Patch
- https://git.kernel.org/stable/c/96474ea47dc67b0704392d59192b233c8197db0ePatch
- https://git.kernel.org/stable/c/bef4a48f4ef798c4feddf045d49e53c8a97d5e37Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.