Bug 2402206 (CVE-2023-53664)

Summary: CVE-2023-53664 kernel: OPP: Fix potential null ptr dereference in dev_pm_opp_get_required_pstate()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A NULL pointer dereference flaw was found in the Linux kernel's OPP (Operating Performance Points) framework in the power state retrieval logic. A local user can trigger this issue by invoking power management operations when the OPP pointer is dereferenced to cache the opp_table before checking whether the pointer is valid. This causes the kernel to dereference a NULL or error pointer, resulting in a kernel crash and denial of service.
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Description OSIDB Bzimport 2025-10-07 16:02:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

OPP: Fix potential null ptr dereference in dev_pm_opp_get_required_pstate()

"opp" pointer is dereferenced before the IS_ERR_OR_NULL() check. Fix it by
removing the dereference to cache opp_table and dereference it directly
where opp_table is used.

This fixes the following smatch warning:

drivers/opp/core.c:232 dev_pm_opp_get_required_pstate() warn: variable
dereferenced before IS_ERR check 'opp' (see line 230)
Comment 1 Jon Moroney 2025-10-07 18:39:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100703-CVE-2023-53664-a38d@gregkh/T