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CVE-2024-40956 is a use-after-free vulnerability in the Linux kernel DMAEngine Intel Data Streaming Accelerator (idxd) driver’s irq_process_work_list processing path. The path iterates a work list while completing descriptors. Descriptor completion can free a descriptor, and concurrent reuse of that descriptor by another thread can invalidate the list iterator when the entry has not first been safely removed. The fix uses safe list iteration so entries may be deleted during traversal without dereferencing a freed or repurposed descriptor.
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What an attacker gets, and what they’ve been doing with it.
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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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A possible use-after-free vulnerability in the Linux kernel DMAEngine IDXD driver's irq_process_work_list function.
Possible Linux kernel DMA engine idxd use-after-free in irq_process_work_list.
Possible Linux kernel DMAEngine idxd use-after-free in irq_process_work_list.
Possible use-after-free in Linux kernel Intel DSA/IDXD interrupt work processing.
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.