What is CVE-2025-31263?

CVE-2025-31263 is a critical-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.1/10. Published 2025-05-29.

How severe is CVE-2025-31263?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Apple macOS

CVE-2025-31263

The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to corrupt coprocessor memory.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (25.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

product-security@apple.com (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2025-31263?: CVE-2025-31263 is a critical-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.1/10. Published 2025-05-29.
How severe is CVE-2025-31263?: Critical severity. CVSS v3 base score is 9.1 out of 10.