Bug 2379211 (CVE-2025-38297)

Summary: CVE-2025-38297 kernel: PM: EM: Fix potential division-by-zero error in em_compute_costs()
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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Description OSIDB Bzimport 2025-07-10 08:03:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

PM: EM: Fix potential division-by-zero error in em_compute_costs()

When the device is of a non-CPU type, table[i].performance won't be
initialized in the previous em_init_performance(), resulting in division
by zero when calculating costs in em_compute_costs().

Since the 'cost' algorithm is only used for EAS energy efficiency
calculations and is currently not utilized by other device drivers, we
should add the _is_cpu_device(dev) check to prevent this division-by-zero
issue.
Comment 1 Avinash Hanwate 2025-07-11 07:55:23 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025071012-CVE-2025-38297-9dee@gregkh/T