iOS 18.6 and macOS Sequoia 15.6 Address Chrome Zero-Day Attack

The iOS 18.6, iPadOS 18.6, and macOS Sequoia 15.6 updates that Apple released yesterday address a major zero-day attack that targeted Chrome users, according to Bleeping Computer.

Chrome Feature 22
Apple says that CVE-2025-6558 was a vulnerability in open source code that also affected Apple software. The flaw could allow remote attackers to execute arbitrary code using HTML pages created for that purpose, escaping Chrome's sandboxing. Google patched the issue on July 15, and said that it had been actively exploited.

In Safari, Apple said that the issue could cause unexpected crashing, but it wasn't known to have been used in attacks against Safari users.

Google hasn't offered up technical details on how the exploit worked, and the company said that additional information would be restricted until the majority of users have updated their devices. Chrome users who have not installed the latest version of Chrome should do so.

Popular Stories

iOS 26

iOS 26.4 and iOS 27 Features Revealed in New Leak

Friday December 12, 2025 10:56 am PST by
Macworld's Filipe Espósito today revealed a handful of features that Apple is allegedly planning for iOS 26.4, iOS 27, and even iOS 28. The report said the features are referenced within the code for a leaked internal build of iOS 26 that is not meant to be seen by the public. However, it appears that Espósito and/or his sources managed to gain access to it, providing us with a sneak peek...
apple beta 26 lineup

Apple Leak Confirms Work on Foldable iPhone, AirTag 2, and Dozens More Devices

Monday December 15, 2025 2:05 pm PST by
Last week, details about unreleased Apple devices and future iOS features were shared by Macworld. This week, we learned where the information came from, plus we have more findings from the leak. As it turns out, an Apple prototype device running an early build of iOS 26 was sold, and the person who bought it shared the software. The OS has a version number of 23A5234w, and the first...
Apple Logo Top Half

Early iOS 26 Software Leak Uncovers Dozens of Upcoming Apple Features

Monday December 15, 2025 3:05 pm PST by
Software from an iPhone prototype running an early build of iOS 26 leaked last week, giving us a glimpse at future Apple devices and iOS features. We recapped device codenames in our prior article, and now we have a list of some of the most notable feature flags that were found in the software code. In some cases, it's obvious what the feature flags are referring to, while some are more...
Apple Foldable Thumb

Leak Reveals Foldable iPhone Details

Monday December 15, 2025 9:09 am PST by
The first foldable iPhone will feature a series of design and hardware firsts for Apple, according to details shared by the Weibo leaker known as Digital Chat Station. According to a new post, via machine translation, Apple is developing what the leaker describes as a "wide foldable" device, a term used to refer to a horizontally oriented, book-style foldable with a large internal display....
iOS 26

iOS 26.3 Beta 1 Features: What's New So Far

Monday December 15, 2025 4:23 pm PST by
Apple is testing iOS 26.3, the next version of iOS 26 that will launch around January. Since iOS 26.3's testing is happening over the holidays, it is a smaller update with fewer features than we've seen in prior betas. We've rounded up what's new so far, and we'll add to our list with subsequent betas if we come across any other features. Transfer to Android Apple is making it simpler...
iOS 26

Apple Releases iOS 26.2 With Alarms for Reminders, Lock Screen Changes, Enhanced Safety Alerts and More

Friday December 12, 2025 10:10 am PST by
Apple today released iOS 26.2, the second major update to the iOS 26 operating system that came out in September, iOS 26.2 comes a little over a month after iOS 26.1 launched. ‌iOS 26‌.2 is compatible with the ‌iPhone‌ 11 series and later, as well as the second-generation ‌iPhone‌ SE. The new software can be downloaded on eligible iPhones over-the-air by going to Settings >...
iOS 26

iOS 26.2 Coming Soon With These 8 New Features on Your iPhone

Thursday December 11, 2025 8:49 am PST by
Apple seeded the second iOS 26.2 Release Candidate to developers earlier this week, meaning the update will be released to the general public very soon. Apple confirmed iOS 26.2 would be released in December, but it did not provide a specific date. We expect the update to be released by early next week. iOS 26.2 includes a handful of new features and changes on the iPhone, such as a new...
airpods max 2024 colors

AirPods Max 2 Likely to Offer These 10 New Features

Monday December 15, 2025 7:41 am PST by
Apple released the AirPods Max on December 15, 2020, meaning the over-ear headphones launched five years ago today. While the AirPods Max were updated with a USB-C port and new color options last year, followed by support for lossless audio and ultra-low latency audio this year, the headphones lack some of the features that have been introduced for newer generations of the regular AirPods and the ...

Top Rated Comments

adamw Avatar
20 weeks ago

Good reason not to trust Google ever :rolleyes:
This not only applies to Google Chrome, but also appears to affect Safari (by causing a crash to it.) Here is more about this exploit:

Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Tracked as CVE-2025-6558 ('https://nvd.nist.gov/vuln/detail/CVE-2025-6558'), the security bug is due to the incorrect validation of untrusted input in the ANGLE (Almost Native Graphics Layer Engine) open-source graphics abstraction layer, which processes GPU commands and translates OpenGL ES API calls to Direct3D, Metal, Vulkan, and OpenGL.

The vulnerability enables remote attackers to execute arbitrary code within the browser's GPU process via specially crafted HTML pages, potentially allowing them to escape the sandbox that isolates browser processes from the underlying operating system.
Score: 12 Votes (Like | Disagree)
ArtOfWarfare Avatar
20 weeks ago

Good reason not to trust Google ever :rolleyes:
This impacts all Chromium browsers, so Brave, Edge, Opera, and most other browsers not named Firefox or Safari.

The same issue causes Safari to crash, which while inconvenient, is preferable to having malicious code able to access data that it shouldn't.

What happens in Firefox?
Score: 11 Votes (Like | Disagree)
Love-hate ? relationship Avatar
20 weeks ago

Good reason not to trust Google ever :rolleyes:
You know how often this has happened to safari? I'll tell you: a damn lot

And when this happens, you need a WHOLE OS update to fix it , while chrome only needs an app update most of the time (not this time around though)
Score: 7 Votes (Like | Disagree)
adamw Avatar
20 weeks ago

How is that even possible unless the person downloads a file or allows third party apps? ?
Sounds like if a Google Chrome (or Safari) user went to view any web page with the malicious code embedded, it could take over their whole system by "allowing remote users to execute arbitrary code" on their machine. Appears to affect anyone using the web browser to view an infected web site, and not only to affect downloads of files or third party apps.
Score: 6 Votes (Like | Disagree)
star-affinity Avatar
20 weeks ago

Good reason not to trust Google ever :rolleyes:

Well, that's not true as Safari is a separate download on Ventura and Sonoma (and every other supported macOS that's not the current one). Having to install a whole point update on the most recent macOS is a choice Apple makes.
But what is true is that security problems are continuously discovered in software from all vendors and it’s definitely not the last time it happens in code written by folks from Google nor Apple.
Score: 6 Votes (Like | Disagree)
culex Avatar
20 weeks ago

Apple released yesterday address a major zero-day attack that targeted Chrome users
How can Apple fix a Chrome bug? That's right, they can't. They simply used the same buggy open source code in Webkit and patched it two weeks after Google. Pretty misleading headline.
Score: 5 Votes (Like | Disagree)