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

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

All Screen iPhone 2030 Feature Sans Text

iPhone 18 Pro: Nine Reasons Not to Upgrade This Year

Monday September 7, 2026 5:01 am PDT by
Apple is set to unveil new iPhone 18 Pro and iPhone 18 Pro Max models on Wednesday, September 9, and the devices are expected to feature a design that's largely similar to the iPhone 17 Pro models, with a peppering of enhancements inside. Major changes are not expected until next year, when Apple is expected to introduce a radically redesigned 20th-anniversary iPhone. If you're thinking of...
Read Full Article • 112 comments
apple surprise and shine event

Apple Event Today: iPhone 18 Pro and iPhone Duo Cheat Sheet

Tuesday September 8, 2026 10:24 am PDT by
Apple's biggest event of the year is almost here, and all eyes are on Cupertino. With the first foldable iPhone expected to headline Apple's "Surprise and Shine" event on Wednesday, September 9, at 10:00 a.m. Pacific Time, the rumor mill has been running full throttle, fuelled by the biggest single design change in the life of the iPhone. To get you up to speed, here's a quick reference...
Read Full Article • 33 comments
apple watch series 12

Leak Hints at Four New Features for Apple Watch Series 12 and Ultra 4

Monday September 7, 2026 8:57 am PDT by
Ahead of the announcement of the Apple Watch Series 12 and Ultra 4 later this week, code in the watchOS 27 and iOS 27 betas points to a series of new features for the product line. The information comes from a new post from MacRumors forums member "pdfu." The findings include: New "Readiness" app: An all-new separate Watch app referred to in code as "Readiness," distinct from the...
Read Full Article • 108 comments

Top Rated Comments

chucker23n1 Avatar
chucker23n1
58 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)
ouimetnick Avatar
ouimetnick
58 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)
K
KaliYoni
58 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)
B
Bokito
58 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
58 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
58 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