Bug 2373689 (CVE-2022-50192)

Summary: CVE-2022-50192 kernel: spi: tegra20-slink: fix UAF in tegra_slink_remove()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-06-18 12:13:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: tegra20-slink: fix UAF in tegra_slink_remove()

After calling spi_unregister_master(), the refcount of master will
be decrease to 0, and it will be freed in spi_controller_release(),
the device data also will be freed, so it will lead a UAF when using
'tspi'. To fix this, get the master before unregister and put it when
finish using it.
Comment 1 Avinash Hanwate 2025-06-18 16:44:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061837-CVE-2022-50192-79d9@gregkh/T