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Out-of-Cancel: A Vulnerability Class Rooted in Workqueue Cancellation APIs | SecNotes

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Out-of-Cancel: A Vulnerability Class Rooted in Workqueue Cancellation APIs

Out-of-Cancel: A Vulnerability Class Rooted in Workqueue Cancellation APIs

Out-of-Cancel: A Vulnerability Class Rooted in Workqueue Cancellation APIs

This article uses the espintcp vulnerability (CVE-2026-23239) as a case study to look at the structure in which the Out-of-Cancel bug class shows up, and to walk through how combining complex kernel interleavings makes the bug actually exploitable.

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LinuxKernelExploit Development

Authors: Unknown Author, V4bel

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sam4kshared 3/24/2026

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