by Kastro
Paper/Archive/CVE-2026-84539

CVE-2026-84539

Apple macOS — An out-of-bounds write issue was addressed with improved bounds checking.

EPSS 0.2%CVSS 9.8
critical.is priorityof 100
32
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 11.6.116 × 202.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Tahoe 26.7.2. An app may be able to cause unexpected system termination.

Affected

ProductAffectedFixed inSource
macOS< 26.7.226.7.2CNA
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/149035refsupport.apple.com/en-us/149522