CVE-2026-43773

An out-of-bounds read was addressed with improved bounds checking

Critical · published July 27, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
47.2
In the wild
Unconfirmed
What it is

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00585 · 47.2th percentile
Published
2026-07-27T20:13Z
EPSS history
Timeline
  • 27 JUL 20:13Z
    An out-of-bounds read was addressed with improved bounds checking
    cvelistv5