Review reviewHigh

CVE-2025-40081

Linux

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: 7.8
EPSS: 0.14%
CISA KEV: Not listed
Published: 2025.10.28

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.14%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= d5d9696b03808bc6be723cc85288c912c3a05606 < 656e9a5d69acdd1b20462f4a33378b90ddcb9626, >= d5d9696b03808bc6be723cc85288c912c3a05606 < 9c045d4501f7f70724a3bbb561f4f22d292bbfe6, >= d5d9696b03808bc6be723cc85288c912c3a05606 < 5d01f2b81568289443d22f1e13a363f829de6343, >= d5d9696b03808bc6be723cc85288c912c3a05606 < 7500384d3c9587593d75ded3b006835e7aa73ef8, >= d5d9696b03808bc6be723cc85288c912c3a05606 < 379cae2cb982f571cda9493ac573ab71125fd299, >= d5d9696b03808bc6be723cc85288c912c3a05606 < 1a19ba8e1f4ff24ece8ca69b79df8442c431db90, >= d5d9696b03808bc6be723cc85288c912c3a05606 < e516cfd19b0f4c774a57b17fb43a7f41991f0735, >= d5d9696b03808bc6be723cc85288c912c3a05606 < a29fea30dd93da16652930162b177941abd8c75e, >= 4.15
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available