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CVE-2025-39973 is an input-validation vulnerability in the Linux kernel Intel i40e Ethernet driver. The driver accepted a ring_len value supplied by a virtual function and assigned it to the hardware memory context without validating its upper bound or required descriptor alignment. Invalid transmit and receive queue lengths could therefore be configured. The fix limits queue lengths to the hardware-supported descriptor range and requires transmit rings to be divisible by 8 and receive rings to be divisible by 32.
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No public exploit code observed for this vulnerability.
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38 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A moderate-severity Linux kernel Intel i40e Ethernet-driver flaw in validation of a virtual function's ring_len parameter. A malicious VF with low privileges could supply an oversized or misaligned value, potentially leading to memory corruption, unauthorized code execution, memory disclosure or modification, and denial of service.
A vulnerability covered by the kernel-rt security advisory; no technical details are provided in the content.
A Linux kernel vulnerability included in the Red Hat Enterprise Linux 7 Extended Lifecycle Support kernel security update; the provided content does not describe its technical impact.
Unknown; the advisory lists this CVE but provides no vulnerability description.
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.