CVE-2026-84545: A use after free issue was addressed with improved memory management

Q: How do I fix CVE-2026-84545?

macos: upgrade to 15.8.2, 26.7.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-84545 being exploited?

CVE-2026-84545 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-84545 affect?

CVE-2026-84545 affects macos. Severity is high (CVSS 8.8). A use after free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app with App Sandbox restrictions may be able to escape the sandbox and execute

Routine

HIGH 8.8UPGRADE

CVE-2026-84545 is a high-severity flaw (CVSS 8.8) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app with App Sandbox restrictions may be able to escape the sandbox and execute code with root privileges.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-10-26
Last modified	2026-11-03

Publisher (CNA): Apple Inc. · Vendor: apple

Last updated 2026-11-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-26 21:20 UTCPublished CVE record published
2026-11-03 16:19 UTCUpdated Record last modified

apple macos UPGRADE

Affected: < 15.8.2 · >= 26.0 and < 26.7.2

Fixed in: 15.8.2, 26.7.2

Safe to downgrade to: a release before 26.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-84545?

macos: upgrade to 15.8.2, 26.7.2. Exact commands for each OS are on this page.

Is CVE-2026-84545 being exploited?

CVE-2026-84545 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-84545 affect?

CVE-2026-84545 affects macos. Severity is high (CVSS 8.8). A use after free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app with App Sandbox restrictions may be able to escape the sandbox and execute

How urgent is CVE-2026-84545?

Priority 35/100. High severity

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-113937 MEDIUM 5.5 UPGRADE An out-of-bounds read was addressed with improved bounds checking
CVE-2026-112699 MEDIUM 6.5 UPGRADE UPGRADE An out-of-bounds read was addressed with improved bounds checking
CVE-2026-112704 MEDIUM 6.5 UPGRADE An information leakage was addressed with additional validation
CVE-2026-112705 MEDIUM 5.5 UPGRADE UPGRADE An out-of-bounds write issue was addressed with improved bounds checking
CVE-2026-113897 CRITICAL 10.0 UPGRADE UPGRADE This issue was addressed by removing the vulnerable code

References

← Back to latest CVEs