Bug 2492460 (CVE-2026-53118)

Summary: CVE-2026-53118 kernel: vdpa: use generic driver_override infrastructure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's vdpa driver. This vulnerability occurs because a specific field, `driver_override`, is accessed without proper locking during the driver's initialization process. An attacker could exploit this Use-After-Free (UAF) condition to potentially execute arbitrary code or cause a system crash (Denial of Service).
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Description OSIDB Bzimport 2026-06-24 18:13:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

vdpa: use generic driver_override infrastructure

When a driver is probed through __driver_attach(), the bus' match()
callback is called without the device lock held, thus accessing the
driver_override field without a lock, which can cause a UAF.

Fix this by using the driver-core driver_override infrastructure taking
care of proper locking internally.

Note that calling match() from __driver_attach() without the device lock
held is intentional. [1]
Comment 1 Mauro Matteo Cascella 2026-06-25 08:04:00 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062415-CVE-2026-53118-a02a@gregkh/T