CVE-2026-86915: A race condition was addressed with improved locking

Q: How do I fix CVE-2026-86915?

macos: upgrade to 27.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-86915 being exploited?

CVE-2026-86915 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-2026-86915 affect?

CVE-2026-86915 affects macos. Severity is medium (CVSS 4.7). A race condition was addressed with improved locking. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.

Q: How urgent is CVE-2026-86915?

Priority 17/100. No elevated risk signals yet.

Routine

MEDIUM 4.7UPGRADE

CVE-2026-86915 is a medium-severity flaw (CVSS 4.7) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A race condition was addressed with improved locking. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-10-20
Last modified	2026-10-29

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

Last updated 2026-10-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-20 01:17 UTCPublished CVE record published
2026-10-29 18:34 UTCUpdated Record last modified

apple macos UPGRADE

Affected: < 27.0

Fixed in: 27.0

Safe to downgrade to: no unaffected older release

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-2026-86915?

macos: upgrade to 27.0. Exact commands for each OS are on this page.

Is CVE-2026-86915 being exploited?

CVE-2026-86915 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-2026-86915 affect?

CVE-2026-86915 affects macos. Severity is medium (CVSS 4.7). A race condition was addressed with improved locking. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.

How urgent is CVE-2026-86915?

Priority 17/100. No elevated risk signals yet.

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-28854 HIGH 7.5 UPGRADE The issue was addressed with additional app bundle integrity checks
CVE-2026-86928 MEDIUM 5.5 UPGRADE A path handling issue was addressed with improved validation
CVE-2026-86932 MEDIUM 5.5 UPGRADE An authorization issue was addressed with improved state management
CVE-2026-86933 LOW 3.3 UPGRADE A permissions issue was addressed with additional sandbox restrictions
CVE-2026-86935 MEDIUM 5.5 UPGRADE This issue was addressed by removing additional entitlements

References

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