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CVE-2022-22047 is a local elevation-of-privilege vulnerability in the Windows Client Server Run-time Subsystem (CSRSS). The issue is described as an activation context cache poisoning flaw in which CSRSS accepts client-supplied manifest XML when generating activation contexts and caches the resulting state for later reuse by other processes in the same session. In the reported exploitation pattern, an attacker requests an activation context for a privileged executable while supplying a malicious manifest that abuses the undocumented manifest XML attribute loadFrom to redirect DLL resolution to an attacker-controlled location on disk. Because CSRSS maintains a per-session activation context cache, a poisoned cache entry can later be reused by a more-privileged process in that same session, causing it to load attacker-controlled code. Microsoft reported the vulnerability as exploited in the wild in July 2022, and public analysis associated exploitation with the KNOTWEED actor.
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No public exploit code observed for this vulnerability.
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Windows local elevation of privilege via CSRSS activation context cache poisoning / manifest abuse (including the undocumented manifest attribute “loadFrom”) enabling privileged DLL redirection/loading.
A vulnerability in Microsoft Windows that was exploited in the wild and added to KEV the same day as public disclosure.
Windows local privilege escalation via CSRSS activation context cache poisoning by supplying a malicious manifest that uses the undocumented manifest attribute "loadFrom" to redirect DLL loads (e.g., advapi32.dll) to an attacker-controlled path, poisoning the per-session activation context cache.
A Microsoft security vulnerability identified as CVE-2022-22047 referenced in a COLCERT security advisory.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.