CVE-2023-27936

Kernel-memory corruption via CommCenter out-of-bounds write

Published May 8, 2023 · Updated Jan 29, 2025

An out-of-bounds write in Apple CommCenter allows local users to terminate affected macOS, iOS, or iPadOS systems or write kernel memory. CommCenter insufficiently validates app-supplied input before a memory write, allowing the write to exceed its intended bounds. Execution of an app on an affected device is required; Apple reports outcomes limited to unexpected system termination or modification of kernel memory.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in Apple CommCenter allows local users to terminate affected macOS, iOS, or iPadOS systems or write kernel memory. CommCenter insufficiently validates app-supplied input before a memory write, allowing the write to exceed its intended bounds. Execution of an app on an affected device is required; Apple reports outcomes limited to unexpected system termination or modification of kernel memory.

The record

CVE
CVE-2023-27936
Published
May 8, 2023
Updated
Jan 29, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-787, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <15.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15.7
Apple · macOSversion=unspecified <11.7; version=unspecified <12.6; version=unspecified <13.3

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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