Bug 2355493 (CVE-2023-53019)

Summary: CVE-2023-53019 kernel: net: mdio: validate parameter addr in mdiobus_get_phy()
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: low    
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 2025-03-27 17:04:13 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: mdio: validate parameter addr in mdiobus_get_phy()

The caller may pass any value as addr, what may result in an out-of-bounds
access to array mdio_map. One existing case is stmmac_init_phy() that
may pass -1 as addr. Therefore validate addr before using it.
Comment 1 Robb Gatica 2025-03-27 21:43:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032717-CVE-2023-53019-441a@gregkh/T