Admins won’t soon forget the patching nightmare of July 2024. One bad software update caused a logic error and boot loop that essentially crashed the world’s computers. The resulting “blue screen of death” across more than 8 million devices grounded airlines, halted surgeries, and froze banking systems to the tune of $10 billion globally.
Clearly, applying patches is one thing but rolling them back is entirely another. When a bad update hits – as we saw with CrowdStrike – teams that can pinpoint the issue and stop the bleeding are best positioned not only to succeed but also to survive.
Faulty patches, broken agents, or buggy releases require admins to move fast before the damage is done. Good patch management is therefore just as much about timely software updating as it is about rapid response and rollback when something goes wrong. Of course, a well-designed patch strategy should make rollbacks rare but, if and when they’re needed, speed is everything.
The what and the why of patch management
It’s worth reiterating that patching – despite the challenges – is a cornerstone of ecosystem health. I’ve previously described patching as the cybersecurity equivalent of flossing – an important preventative practice businesses know they should do but too many skip. And this patch aversion is evident across sectors.
In the public sector, about 80% of organizations operate with “significant security debt”, meaning software flaws left unaddressed for more than a year. And in healthcare, exploited vulnerabilities are now the leading technical cause of ransomware – a big problem as successful attacks disrupt patient care and average recovery costs exceed $1 million.
The three phases of patch rollbacks
In an ideal patch rollback playbook, there are three phases for teams to carefully follow:
• First, establish a kill switch. Containment is the aim as soon as there’s an issue and response depends on how the patch was deployed – if it was automated, pause it, or if it was pushed via policy, defer the update window until teams can figure out exactly what’s going on. Most admins usually look to delete the update policy but this isn’t fast enough. Instead, by configuring devices connected to a unified endpoint management (UEM) platform to delay the update period, devices that subsequently check for updates will find “no updates available”. This stops the spread at the operating system level, creating a quick and effective firebreak for the surviving nodes.
• Second, focus on the fix. Even the fastest killswitch is unlikely to stop some bad updates from getting through. This is where automation is your best friend: it can configure dynamic device groups that automatically funnel remediation workflows to affected devices and lock down unaffected devices. This ensures rollback only touches the machines that need it and never downgrades a device that’s running normally.
• Third, execute a wholesale rollback. Ideally, teams shouldn’t get to this point, but this is a “break in case of emergency” scenario. If the bad update takes hold in the production environment, remediation depends on the patch itself – if it can be uninstalled, deploy a script to remove it silently across the fleet without affecting anything else. If not, a pre-configured snapshot becomes the restore point, reverting the system to its pre-update state without a full wipe. Done right, neither fix requires significant downtime or user disruption. One caveat: not all patches support rollback. Critical security updates, in particular, may not be reversible, which makes rolling them out to a beta group and testing in stages before a wide release all the more essential.
Overcoming update apprehension
There is, of course, a final phase that admins prefer not to think about – the reality that a bad update could brick devices and bring operations to a standstill. The silver lining? A device stuck in a boot loop can still briefly connect to the network, giving admins a narrow window to attempt to push a script that forces the device into safe mode and stops the cycle. This makes it “reachable” for a technician for immediate remediation.
Patch rollouts don’t get much more painful than that and the real-world implications can be widespread. However, I’m not sharing patch horror stories to put you off. Patching (like flossing) isn’t something we can forgo because it’s uncomfortable or inconvenient. Instead, we need to recognize that patch complications do happen but there are fixes at every step. Pre-deployment testing and post-deployment monitoring go a long way toward catching patching problems before they become a crisis. Further, we need to keep in mind that the danger of leaving backdoors open and accepting known vulnerabilities is arguably even worse.
By thinking backwards and planning for the worst, teams can reverse the next bad patch in minutes rather than days and overcome their update apprehension.
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Author: Apu Pavithran
Founder & CEO, Hexnode
Apu Pavithran is the founder and CEO of Hexnode, an industry-leading endpoint management solution that provides a comprehensive set of features to secure, manage, and remotely monitor devices across the enterprise. Apu’s a recognized consultant, speaker, and thought leader in the IT management community with a focus on governance and information security.
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