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CVE-2025-38393 is a race condition in the Linux kernel NFSv4/pNFS layout-handling logic. A race between a task waiting on the NFS_LAYOUT_DRAIN bit in pnfs_update_layout() and the corresponding wakeup path can leave the task waiting even after the pnfs_layout_hdr plh_outstanding count reaches zero. The fix applies a memory barrier to synchronize the waiter and waker.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel NFSv4/pNFS race condition involving wake-up handling for NFS_LAYOUT_DRAIN that can leave tasks hung in writeback, resulting in a local denial of service.
Unknown; the advisory lists this CVE but does not describe the issue.
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.