What’s Vulnerable › Vulnerabilities

CVE-2025-40081: perf: arm_spe: Prevent overflow in PERF_IDX2OFF()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-28 · updated 2026-10-19

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).

Affected products

• Linux kernel: 4.15 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1a19ba8e1f4ff24ece8ca69b79df8442c431db90
• https://git.kernel.org/stable/c/379cae2cb982f571cda9493ac573ab71125fd299
• https://git.kernel.org/stable/c/5d01f2b81568289443d22f1e13a363f829de6343
• https://git.kernel.org/stable/c/656e9a5d69acdd1b20462f4a33378b90ddcb9626
• https://git.kernel.org/stable/c/7500384d3c9587593d75ded3b006835e7aa73ef8
• https://git.kernel.org/stable/c/9c045d4501f7f70724a3bbb561f4f22d292bbfe6
• https://git.kernel.org/stable/c/a29fea30dd93da16652930162b177941abd8c75e
• https://git.kernel.org/stable/c/e516cfd19b0f4c774a57b17fb43a7f41991f0735

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