CVE-2022-26758: A malicious application may cause unexpected changes in memory shared between processes

Q: How do I fix CVE-2022-26758?

macos: upgrade to 12.4. Exact commands for each OS are on this page.

Q: Is CVE-2022-26758 being exploited?

CVE-2022-26758 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-2022-26758 affect?

CVE-2022-26758 affects macos. Severity is high (CVSS 7.1). A malicious application may cause unexpected changes in memory shared between processes. A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.4.

Routine

HIGH 7.1UPGRADE

CVE-2022-26758 is a high-severity flaw (CVSS 7.1) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A malicious application may cause unexpected changes in memory shared between processes. A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.4.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-06-10
Last modified	2026-07-23

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

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-10 22:16 UTCPublished CVE record published
2026-07-23 09:10 UTCUpdated Record last modified

apple macos UPGRADE

Affected: < 12.4

Fixed in: 12.4

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-2022-26758?

macos: upgrade to 12.4. Exact commands for each OS are on this page.

Is CVE-2022-26758 being exploited?

CVE-2022-26758 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-2022-26758 affect?

CVE-2022-26758 affects macos. Severity is high (CVSS 7.1). A malicious application may cause unexpected changes in memory shared between processes. A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.4.

How urgent is CVE-2022-26758?

Priority 25/100. High severity

Software pages

macOS vulnerabilities

Related CVEs

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CVE-2026-64767 CRITICAL 9.8 UPGRADE A buffer overflow was addressed with improved bounds checking
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CVE-2026-28864 LOW 3.3 UPGRADE UPGRADE This issue was addressed with improved permissions checking

References

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