CVE-2026-112593: An out-of-bounds write issue was addressed with improved bounds checking

Q: How do I fix CVE-2026-112593?

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

Q: Is CVE-2026-112593 being exploited?

CVE-2026-112593 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-2026-112593 affect?

CVE-2026-112593 affects macos. Severity is high (CVSS 7.7). An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to cause unexpected system termination or write kernel memory.

Routine

HIGH 7.7UPGRADE

CVE-2026-112593 is a high-severity flaw (CVSS 7.7) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to cause unexpected system termination or write kernel memory.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-10-26
Last modified	2026-11-04

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

Last updated 2026-11-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-26 21:17 UTCPublished CVE record published
2026-11-04 17:53 UTCUpdated Record last modified

apple macos UPGRADE

Affected: < 15.8.2 · >= 26.0 and <= 26.7.2

Fixed in: 15.8.2

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-2026-112593?

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

Is CVE-2026-112593 being exploited?

CVE-2026-112593 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-2026-112593 affect?

CVE-2026-112593 affects macos. Severity is high (CVSS 7.7). An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to cause unexpected system termination or write kernel memory.

How urgent is CVE-2026-112593?

Priority 29/100. High severity

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-86968 HIGH 7.5 UPGRADE UPGRADE An access issue was addressed with improved access control
CVE-2026-86973 MEDIUM 6.5 UPGRADE UPGRADE An out-of-bounds read was addressed with improved bounds checking
CVE-2026-86974 HIGH 7.5 UPGRADE UPGRADE A type confusion issue was addressed with improved checks
CVE-2026-86990 MEDIUM 5.1 UPGRADE UPGRADE An access issue was addressed with improved access restrictions
CVE-2026-112568 MEDIUM 5.5 UPGRADE A logic issue was addressed with improved checks

References

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