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CVE-2021-47596 is a use-after-free vulnerability in the Linux kernel HNS3 virtual-function network driver, affecting hclgevf_send_mbx_msg. During HNS3 device removal, the client instance is uninstalled before the acceleration-engine device. The client teardown frees the associated netdevice, while acceleration-engine teardown can subsequently access that freed object to trace runtime information. The upstream fix validates the client-instance registration state before the access, preventing use of the released netdevice.
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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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free vulnerability in the Linux kernel HNS3 network driver's hclgevf_send_mbx_msg function.
A use-after-free vulnerability in the Linux kernel HNS3 network driver function hclgevf_send_mbx_msg.
A use-after-free vulnerability in the Linux kernel HNS3 network driver mailbox-message send path.
A Linux kernel HNS3 network-driver use-after-free vulnerability in hclgevf_send_mbx_msg.
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.