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CVE-2025-40064 is a use-after-free vulnerability in the Linux kernel Shared Memory Communications (SMC) networking subsystem. During connect(), smc_pnet_find_ism_resource() obtains a destination network-device pointer and passes it to pnet_find_base_ndev() without adequately protecting the device's lifetime. Concurrent device teardown can replace the destination's device with blackhole_netdev and release the original device reference before the RTNL lock is acquired. Consequently, __pnet_find_base_ndev() accesses an already-freed net_device object. smc_pnet_find_roce_resource() has the same reference-handling defect. The vulnerability can cause kernel memory-safety failures and denial of service.
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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.
44 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability covered by the Miracle Linux kernel security update AXSA-2026-1991. No flaw-specific technical description is provided.
A vulnerability referenced by a Rocky Linux 9 kernel security update. No technical flaw details are provided.
Linux kernel SMC use-after-free vulnerability in __pnet_find_base_ndev().
A high-impact local vulnerability affecting Unity Linux/UOS Server packages, requiring local access and low privileges, with potential complete compromise of confidentiality, integrity, and availability.
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.