---
id: CVE-2026-64779
title: A memory corruption vulnerability was addressed with improved locking
summary: >-
  A memory corruption vulnerability was addressed with improved locking. This
  issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1
  and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously
  crafted we…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L'
cwe:
  - CWE-362
  - CWE-667
vendor: apple
product: ipados
affected:
  - ipados < 18.7.10
  - 'ipados >= 26.0, < 26.6.1'
  - iphone_os < 18.7.10
  - 'iphone_os >= 26.0, < 26.6.1'
  - 'macos >= 26.0, < 26.6.2'
patched:
  - ipados 26.6.1
  - iphone_os 26.6.1
  - macos 26.6.2
published: '2026-08-17'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T21:17:15.533'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64779'
references:
  - url: 'https://support.apple.com/en-us/148281'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148282'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148286'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148287'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149038'
    label: product-security@apple.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64779.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-64779'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2524570'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-64779'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64779'
  - url: 'https://access.redhat.com/errata/RHSA-2026:69098'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00394
epssPercentile: 0.33396
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-18T13:15:20.777358Z'
ingestedAt: '2026-09-14T21:15:17.554Z'
scores:
  nvd: 3.1
  vendor: 8.8
---

## Overview

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously crafted web content may lead to an unexpected Safari crash.

## Affected

- `ipados < 18.7.10`
- `ipados >= 26.0, < 26.6.1`
- `iphone_os < 18.7.10`
- `iphone_os >= 26.0, < 26.6.1`
- `macos >= 26.0, < 26.6.2`

## Remediation

Upgrade past the affected range:

- `ipados 26.6.1`
- `iphone_os 26.6.1`
- `macos 26.6.2`

## Vendor advisories

- **RHSA-2026:69098** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69098)
- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64779.json)