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CVE-2025-39973 affects the Linux kernel's Intel i40e Ethernet driver. The driver assigns the ring_len parameter supplied by a virtual function (VF) directly to the hardware memory context (HMC) without validating its size or alignment. A malicious VF can submit an oversized or misaligned descriptor-ring length, potentially causing excessive transmit or receive queue lengths, memory corruption, or undefined behavior. The fix limits both Tx and Rx rings to the hardware-supported maximum of 8,160 descriptors and requires Tx lengths to be multiples of 8 and Rx lengths to be multiples of 32.
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A Linux kernel i40e driver vulnerability involving insufficient validation of VF-supplied ring lengths. The fix limits ring lengths to the hardware-supported maximum of 8k-32 descriptors and requires Tx rings to be multiples of 8 and Rx rings to be multiples of 32. The reference assigns a CVSS v3 base score of 8.8, describing local exploitation requiring low privileges, with high confidentiality, integrity, and availability impacts.
A vulnerability addressed by the referenced CentOS/TuxCare security advisory.
Vulnerability referenced by the advisory; no individual description is provided.
A high-impact locally exploitable vulnerability affecting Unity Linux/UOS Server systems. Exploitation requires local access and low privileges, requires no user interaction, and can compromise confidentiality, integrity, and availability across a changed security scope.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.