by Kastro
Paper/Archive/CVE-2026-84520

CVE-2026-84520

Apple macOS — A buffer overflow was addressed with improved size validation.

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 38.6.386 × 207.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Golden Gate 27. A local attacker may be able to cause unexpected system termination or corrupt kernel memory.

Affected

ProductAffectedFixed inSource
macOS< 2727CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refsupport.apple.com/en-us/149035