Bug 2330354 (CVE-2024-53126)

Summary: CVE-2024-53126 kernel: vdpa: solidrun: Fix UB bug with devres
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2330490    
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Description OSIDB Bzimport 2024-12-04 15:02:23 UTC 
In the Linux kernel, the following vulnerability has been resolved:

vdpa: solidrun: Fix UB bug with devres

In psnet_open_pf_bar() and snet_open_vf_bar() a string later passed to
pcim_iomap_regions() is placed on the stack. Neither
pcim_iomap_regions() nor the functions it calls copy that string.

Should the string later ever be used, this, consequently, causes
undefined behavior since the stack frame will by then have disappeared.

Fix the bug by allocating the strings on the heap through
devm_kasprintf().
Comment 1 Avinash Hanwate 2024-12-05 04:05:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024120448-CVE-2024-53126-0282@gregkh/T