CVE-2026-43767

System crash via undisclosed HFS memory corruption

Published Jul 27, 2026 · Updated Jul 27, 2026

Memory corruption in the HFS component of Apple macOS before 14.8.8, before 15.7.8, or before 26.6 allows local users to crash the system. Apple has not disclosed the faulty HFS memory operation or the input that triggers the corruption beyond citing improved memory handling. Exploitation requires local low-privileged access and user interaction through an app; the documented consequence is a system crash with no reported confidentiality or integrity impact.

CVSS severity5.0
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the HFS component of Apple macOS before 14.8.8, before 15.7.8, or before 26.6 allows local users to crash the system. Apple has not disclosed the faulty HFS memory operation or the input that triggers the corruption beyond citing improved memory handling. Exploitation requires local low-privileged access and user interaction through an app; the documented consequence is a system crash with no reported confidentiality or integrity impact.

The record

CVE
CVE-2026-43767
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-119, CWE-787, CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <14.8.8
  2. Affected versionversion=0 <15.7.8
  3. Affected versionversion=0 <26.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · macOSversion=0 <14.8.8; version=0 <15.7.8; version=0 <26.6

Published CVSS scores

5.0CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787Out-of-bounds Write
CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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