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CVE-2025-32701 is a use-after-free vulnerability in the Windows Common Log File System (CLFS) driver. Microsoft describes it as a flaw that allows an authorized attacker to elevate privileges locally. Supporting content indicates the bug is in CLFS memory lifecycle handling, where a freed CLFS log-related object can later be reused, leading to dereference of attacker-controlled data. Reported exploitation paths reference crafted CLFS log operations such as CreateLogFile and AddLogContainer, followed by reclaiming freed memory to corrupt a kernel pointer and achieve code execution in kernel context. The vulnerability affects Windows systems using the CLFS driver and was reported as actively exploited in the wild at disclosure time.
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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.
If you can’t patch tonight, do this now.
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.
26 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows CLFS driver elevation of privilege vulnerability reported as exploited and included in CISA KEV.
An elevation of privilege vulnerability in the Windows Common Log File System Driver (CLFS) explicitly listed as under exploitation in the wild.
Elevation of privilege vulnerability in Windows Common Log File System (CLFS).
A use-after-free vulnerability in Windows CLFS, used for elevation of privilege in ransomware operations.
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.