Bug 2315207 (CVE-2024-46856)

Summary: CVE-2024-46856 kernel: net: phy: dp83822: Fix NULL pointer dereference on DP83825 devices
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Bug Depends On: 2315248    
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Description OSIDB Bzimport 2024-09-27 13:23:05 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: phy: dp83822: Fix NULL pointer dereference on DP83825 devices

The probe() function is only used for DP83822 and DP83826 PHY,
leaving the private data pointer uninitialized for the DP83825 models
which causes a NULL pointer dereference in the recently introduced/changed
functions dp8382x_config_init() and dp83822_set_wol().

Add the dp8382x_probe() function, so all PHY models will have a valid
private data pointer to fix this issue and also prevent similar issues
in the future.
Comment 1 Robb Gatica 2024-09-27 14:40:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024092743-CVE-2024-46856-c304@gregkh/T