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CVE-2025-40064 is a use-after-free vulnerability in the Linux kernel Shared Memory Communications (SMC) networking subsystem. During the connect() path, smc_pnet_find_ism_resource() and smc_pnet_find_roce_resource() could obtain a net_device through the socket destination without retaining a device reference before passing it to pnet_find_base_ndev(). While the device is being removed, the destination device can be replaced and its reference released before RTNL acquisition, leaving __pnet_find_base_ndev() to dereference freed memory. The fix safely obtains the destination and device, retaining the device reference through use of __sk_dst_get() and dst_dev_rcu().
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38 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel use-after-free vulnerability in the SMC subsystem function __pnet_find_base_ndev().
A Linux kernel SMC use-after-free vulnerability in __pnet_find_base_ndev().
A Linux kernel SMC use-after-free vulnerability in __pnet_find_base_ndev() addressed by this Red Hat kernel security update.
A Linux kernel SMC use-after-free vulnerability in __pnet_find_base_ndev().
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.