Bug 2420281 (CVE-2023-53816)

Summary: CVE-2023-53816 kernel: drm/amdkfd: fix potential kgd_mem UAFs
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel related to improper synchronization in a filesystem allocation path. Under certain conditions, concurrent operations may access and modify shared kernel data structures without adequate locking. This race condition can result in inconsistent internal state, triggering kernel warnings, memory corruption, or a system crash.
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Description OSIDB Bzimport 2025-12-09 01:05:36 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: fix potential kgd_mem UAFs

kgd_mem pointers returned by kfd_process_device_translate_handle are
only guaranteed to be valid while p->mutex is held. As soon as the mutex
is unlocked, another thread can free the BO.
Comment 1 Alexander B 2025-12-10 04:39:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120945-CVE-2023-53816-e869@gregkh/T