Apple Fixed Two Actively Exploited Vulnerabilities in macOS 12.3.1 Monterey, But Hasn't Released Updates for Big Sur or Catalina

by

With the release of macOS Monterey 12.3.1 on Thursday, March 31, Apple addressed two critical vulnerabilities that may have been actively exploited in the wild, but as Intego pointed out this week, Apple left macOS Big Sur and macOS Catalina users vulnerable.

macOS Big Sur Feature Triad
The macOS Monterey 12.3.1 update fixed a pair of security flaws, including an AppleAVD issue that could allow an application to execute arbitrary code with kernel privileges and an Intel Graphics Driver issue that could allow an application to read kernel memory. Apple said that it was aware of reports that these vulnerabilities "may have been actively exploited," aka there are attacks that use these specific security holes.

Apple often provides security updates for macOS Catalina and macOS Big Sur users alongside macOS Monterey updates to make sure that Mac users who continue to run older operating systems remain protected. Apple has not done so in this case, and there are no security fixes for macOS 11 Big Sur or macOS 10.15 Catalina.

macOS Big Sur and macOS Catalina are still being supported with updates for notable vulnerabilities, so it is not clear why security fixes have not been released. According to Intego, this is the first time that Apple has not released simultaneous security patches for Big Sur and Catalina alongside fixes provided for macOS Monterey.

Big Sur remains vulnerable to CVE-2022-22675 (the AppleAVD bug), while CVE-2022-22674 (an Intel Graphics Driver bug) likely impacts both Big Sur and Catalina, based on research conducted by Intego.

There are some Mac users who choose to remain on Big Sur or Catalina who could install Monterey to get security fixes, but other Mac users have older hardware that is not able to be updated to Monterey, and these users have no way to address the security flaws that are now publicized.

Intego estimates that around 35 percent of Macs in use today could be affected by one or both vulnerabilities, and Apple has not responded to the site's request for an update on when security fixes might come out for Big Sur and Catalina.

Related Forums: macOS Catalina, macOS Big Sur

Popular Stories

iPhone 17 Pro Dark Blue and Orange

iPhone 17 Release Date, Pre-Orders, and What to Expect

Thursday August 28, 2025 4:08 am PDT by
An iPhone 17 announcement is a dead cert for September 2025 – Apple has already sent out invites for an "Awe dropping" event on Tuesday, September 9 at the Apple Park campus in Cupertino, California. The timing follows Apple's trend of introducing new iPhone models annually in the fall. At the event, Apple is expected to unveil its new-generation iPhone 17, an all-new ultra-thin iPhone 17...
Read Full Article • 58 comments
iPhone 17 Pro Iridescent Feature 2

iPhone 17 Pro Clear Case Leak Reveals Three Key Changes

Sunday August 31, 2025 1:26 pm PDT by
Apple is expected to unveil the iPhone 17 series on Tuesday, September 9, and last-minute rumors about the devices continue to surface. The latest info comes from a leaker known as Majin Bu, who has shared alleged images of Apple's Clear Case for the iPhone 17 Pro and Pro Max, or at least replicas. Image Credit: @MajinBuOfficial The images show three alleged changes compared to Apple's iP...
Read Full Article • 76 comments
xiaomi apple ad india

Apple and Samsung Push Back Against Xiaomi's Bold India Ads

Friday August 29, 2025 4:54 am PDT by
Apple and Samsung have reportedly issued cease-and-desist notices to Xiaomi in India for an ad campaign that directly compares the rivals' devices to Xiaomi's products. The two companies have threatened the Chinese vendor with legal action, calling the ads "disparaging." Ads have appeared in local print media and on social media that take pot shots at the competitors' premium offerings. One...
Read Full Article • 209 comments
iOS 18 on iPhone Arrow Down

Apple Preparing iOS 18.7 for iPhones as iOS 26 Release Date Nears

Sunday August 31, 2025 4:35 pm PDT by
Apple is preparing to release iOS 18.7 for compatible iPhone models, according to evidence of the update in the MacRumors visitor logs. We expect iOS 18.7 to be released in September, alongside iOS 26. The update will likely include fixes for security vulnerabilities, but little else. iOS 18.7 will be one of the final updates ever released for the iPhone XS, iPhone XS Max, and iPhone XR,...
Read Full Article • 47 comments
maxresdefault

The MacRumors Show: iPhone 17's 'Awe Dropping' Accessories

Friday August 29, 2025 8:12 am PDT by
Following the announcement of Apple's upcoming "Awe dropping" event, on this week's episode of The MacRumors Show we talk through all of the new accessories rumored to debut alongside the iPhone 17 lineup. Subscribe to The MacRumors Show YouTube channel for more videos We take a closer look at Apple's invite for "Awe dropping;" the design could hint at the iPhone 17's new thermal system with ...
Read Full Article • 22 comments

Top Rated Comments

chucker23n1 Avatar
chucker23n1
45 months ago

According to Intego, this is the first time that Apple has not released simultaneous patches for Big Sur and Catalina alongside a security update provided for macOS Monterey.
It's not.

Big Sur and Catalina did get theirs on the same day with 12.3:



But they didn't with 12.2.1:




So, it's not unprecedented for there to be a gap of a few days.

Attachment Image

Attachment Image
Score: 20 Votes (Like | Disagree)
KaliYoni Avatar
KaliYoni
45 months ago
This is terrible on Apple's part because even Mac users who stay within the last two releases of macOS are, often unknowingly as Intego's research revealed, put at risk. Worse, the lack of any written support timeline makes it impossible to have any kind of rational upgrade plan.

----------
A good discussion about how macOS inconsistencies and opaque updates are hurting users, for anybody interested:

"As far as macOS goes, everyone will tell you that Apple supports the current version for about a year before it’s replaced by a new major release, then provides two years of security updates for it. The strange thing about that is Apple doesn’t seem to have committed that to writing, and I’ve searched long and hard for its official policy on many occasions. This article sets out what Apple has actually done over the last few years, from OS X Mavericks onwards."
https://eclecticlight.co/2021/09/22/how-long-does-apple-support-macos/
Score: 17 Votes (Like | Disagree)
ouimetnick Avatar
ouimetnick
45 months ago
Wish they still actively supported macOS Mojave.. Folks still use that OS for certain things (32 bit apps, dashboard, iTunes, etc)
Score: 17 Votes (Like | Disagree)
Bokito Avatar
Bokito
45 months ago
Apple is more and more pushing users to use the latest OS. That they removed the option to hide the nagging notification of new OS versions with a security update was just the start. Just providing a single patch for iOS 14 after the iOS 15 launch after promising 'it would continue to receive update' was a big FU to users.

I'm using a lot of apps that are too complex to be fully compatible with a new OS on day one, so I'm still running Big Sur. I'm not sure why Apple isn't updating Big Sur and Catalina. They really should communicate about it, but Apple's communication is lacking lately. I don't see why they can't backport the fixes with minimal effort certainly if they're actively exploited.
Score: 15 Votes (Like | Disagree)
sw1tcher Avatar
sw1tcher
45 months ago

Every company has limited engineering resources and Apple is no different.

Ideally, everything is updated at the same time with no bugs. Realistically, Apple needs to focus on the latest OS and most recent devices.
Apple, a nearly $3 trillion company, with limited engineering resources? ?

How is it that a smaller company like Microsoft can offer a much longer support window than Apple? Take a look at Windows 10. It came out on Jul 29, 2015 and Microsoft will be supporting it until Oct 14, 2025 ('https://docs.microsoft.com/en-us/lifecycle/products/windows-10-home-and-pro')

5 years of mainstream support from the release date and 10 years of extended support is pretty darn impressive.
Score: 8 Votes (Like | Disagree)
visualseed Avatar
visualseed
45 months ago
I have a 2012 Mac Mini that is on the beta track for Catalina and just got notified of an update

"macOS Catalina Security Update Developer Beta 2022-004 10.15.7"

So I suspect it's in the pipe for a GM release.
Score: 7 Votes (Like | Disagree)
Read All Comments