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CVE-2025-40134 is a race-condition flaw in the Linux kernel device mapper subsystem. The vulnerability arises in the suspend path, specifically in __dm_suspend(), when a dm device suspend operation races with table loading. If suspend is invoked before table load completes, queue initialization may be only partially finished: queue operations may already be assigned while the associated tag set remains uninitialized. In that state, request-based suspend logic can proceed into queue quiescing and target I/O wait paths and dereference a NULL pointer, leading to a kernel crash. The fix adds validation that a valid device-mapper table is present before performing table-dependent request-based suspend operations and skips those steps when no table has been loaded.
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No public exploit code observed for this vulnerability.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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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.