BaseFortify

Publication date: 2025-10-28

Last updated on: 2025-10-30

Assigner: kernel.org

Description

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).

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-28

Last Modified

2025-10-30

Generated

2026-07-06

AI Q&A

2025-10-28

EPSS Evaluated

2026-07-05

NVD

CVE-2025-40081

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is in the Linux kernel's perf subsystem, specifically in the arm_spe component. It involves an overflow issue in the PERF_IDX2OFF() function. The problem occurs because the number of pages (nr_pages) was not properly cast to an unsigned long, which can cause an overflow when handling large AUX buffer sizes of 2 GiB or more. The fix involves casting nr_pages to unsigned long to prevent this overflow.

Impact Analysis

If exploited, this vulnerability could cause incorrect handling of large AUX buffer sizes in the perf subsystem, potentially leading to memory corruption or crashes in the Linux kernel on affected systems. This could impact system stability or security, especially on systems using ARM SPE features with large AUX buffers.

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