Bug 2406743 (CVE-2025-40081)

Summary: CVE-2025-40081 kernel: perf: arm_spe: Prevent overflow in PERF_IDX2OFF()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-28 12:03:04 UTC 
In the Linux kernel, the following vulnerability has been resolved:

perf: arm_spe: Prevent overflow in PERF_IDX2OFF()

Cast nr_pages to unsigned long to avoid overflow when handling large
AUX buffer sizes (>= 2 GiB).
Comment 1 Jon Moroney 2025-10-28 18:57:06 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102820-CVE-2025-40081-c552@gregkh/T