Description
A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Connecting to a malicious afpfs server may lead to kernel memory corruption.
Published: 2026-09-14
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

The buffer overflow occurs when the macOS kernel processes a connection to a malicious AFP that this leads to kernel memory corruption. Based on the description, it is inferred that gain code execution or elevate privileges, thereby affecting the machine.

Affected Systems

Apple releases of macOS—including Sequoia, Sonoma, and Tahoe—are impacted. Systems running any version prior to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6 that use AFPFS for file sharing are potentially exposed.

Risk and Exploitability

The likely attack vector is a malicious AFPFS server that a vulnerable macOS system connects to. When can corrupt memory, potentially leading to remote code execution or privilege escalation. Though the EPSS score indicates a probability of less than in the CISA KEV catalog, the kernel‑level corruption remains a high‑severity risk. Based on the description, attackers could host a rogue AFP server within or adjacent to the target network, ensuring that a vulnerable system automatically connects and triggers the overflow.

Generated by OpenCVE AI on September 20, 2026 at 19:10 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update to macOS Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6 or later following the Apple support advisories, which fix the bounds‑checking issue.
  • Disable AFP services or restrict them to trusted networks using firewall rules to limit exposure.
  • Monitor network traffic for unexpected AFP connections and block any identified malicious server IPs to prevent inadvertent exploitation.

Generated by OpenCVE AI on September 20, 2026 at 19:10 UTC.

Tracking

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Advisories

No advisories yet.

History

Sun, 20 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Title macOS AFPFS Buffer Overflow Leading to Kernel Memory Corruption

Thu, 17 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Wed, 16 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
Title AFPFS Buffer Overflow in macOS Kernel
Weaknesses CWE-119

Tue, 15 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Title AFPFS Buffer Overflow in macOS Kernel
Weaknesses CWE-119

Tue, 15 Sep 2026 00:30:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Connecting to a malicious afpfs server may lead to kernel memory corruption.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apple

Published:

Updated: 2026-09-18T03:56:18.302Z

Reserved: 2026-05-01T22:46:27.821Z

Link: CVE-2026-43815

cve-icon Vulnrichment

Updated: 2026-09-17T17:14:35.799Z

cve-icon NVD

Status : Modified

Published: 2026-09-14T21:17:12.410

Modified: 2026-09-18T04:17:49.960

Link: CVE-2026-43815

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T19:15:03Z

Weaknesses