CVE-2026-84581: A buffer overflow was addressed with improved bounds checking

Q: How do I fix CVE-2026-84581?

macos: upgrade to 15.8, 26.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-84581 being exploited?

CVE-2026-84581 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-2026-84581 affect?

CVE-2026-84581 affects macos. Severity is high (CVSS 8.4). A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt k

Routine

HIGH 8.4UPGRADE

CVE-2026-84581 is a high-severity flaw (CVSS 8.4) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-120
Published	2026-09-14
Last modified	2026-09-16

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

Last updated 2026-09-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-14 21:17 UTCPublished CVE record published
2026-09-16 18:04 UTCUpdated Record last modified

apple macos UPGRADE

Affected: >= 15.0 and < 15.8 · >= 26.0 and < 26.7

Fixed in: 15.8, 26.7

Safe to downgrade to: a release before 15.0

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-2026-84581?

macos: upgrade to 15.8, 26.7. Exact commands for each OS are on this page.

Is CVE-2026-84581 being exploited?

CVE-2026-84581 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-2026-84581 affect?

CVE-2026-84581 affects macos. Severity is high (CVSS 8.4). A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt k

How urgent is CVE-2026-84581?

Priority 32/100. High severity

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-112529 HIGH n/a UPGRADE An out-of-bounds read was addressed with improved bounds checking
CVE-2026-112483 HIGH n/a UPGRADE A path handling issue was addressed with improved validation
CVE-2026-112495 HIGH n/a UPGRADE An out-of-bounds read was addressed with improved bounds checking
CVE-2026-112456 HIGH n/a UPGRADE UPGRADE An out-of-bounds write issue was addressed with improved input validation
CVE-2026-112513 HIGH n/a UPGRADE This issue was addressed with improved validation of symlinks

References

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