CVE-2024-21302 is an elevation of privilege vulnerability in Windows systems that support Virtualization-Based Security (VBS), including affected Windows 10, Windows 11, Windows Server, and certain Azure virtual machine SKUs. The flaw allows an attacker who already has administrative privileges on the target to replace current Windows system files with older, vulnerable versions. This rollback or downgrade condition can reintroduce previously patched weaknesses into components involved in VBS and secure kernel protections. Microsoft characterizes the issue as affecting VBS-capable systems broadly, and later mitigations were introduced to block loading of vulnerable VBS-related binaries and to bind protected secrets to approved code integrity policy states.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows Secure Kernel Mode elevation of privilege vulnerability involving rollback of VBS-related system binaries to older vulnerable versions, potentially allowing an administrator-level attacker to circumvent VBS protections and exfiltrate VBS-protected data.
One of two CVEs Microsoft assigned in response to the SafeBreach Windows Downdate research covering downgrade-related Windows vulnerabilities.
A critical vulnerability in Windows update architecture and Virtualization-Based Security (VBS) that allows attackers to downgrade OS components, bypass security features, and reintroduce previously patched vulnerabilities, potentially leading to privilege escalation and system compromise.
An elevation of privilege vulnerability in Windows Secure Kernel Mode, with mitigations published but a full fix still in progress.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.