AZL-54821
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-54821.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-54821
- Upstream
- Published
- 2024-05-21T16:15:14Z
- Modified
- 2026-04-21T04:35:42Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2023-52749 affecting package kernel 5.15.200.1-1
- Details
-
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.
- References