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CVE-2026-46173 is a Linux kernel task-exit vulnerability affecting the path in which an already-exiting task encounters an oops. In this condition, make_task_dead() can invoke do_task_dead() while preemption remains enabled, despite do_task_dead() ultimately entering __schedule(), which requires preemption to be disabled. If the task is preempted after it is marked TASK_DEAD but before it explicitly enters the scheduler, finish_task_switch() can incorrectly treat its stack as permanently unused and release its references repeatedly. The resulting state can produce task-stack use-after-free or double-free conditions and permit multiple tasks to execute using the same stack, causing kernel memory corruption. A single oops during task exit, including one in a file_operations::release handler, is sufficient; recursive oopsing is not required.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel exit-path vulnerability related to preemption of an oopsing TASK_DEAD task.
A Linux kernel task exit handling vulnerability involving preemption of an oopsing TASK_DEAD task, fixed in this Red Hat kernel update.
A Linux kernel vulnerability in task exit handling related to preemption of an oopsing TASK_DEAD task.
A Linux kernel exit-path vulnerability involving preemption of an oopsing TASK_DEAD task, fixed in this Red Hat kernel-rt 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.
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.