{"cve":"CVE-2025-39973","nvd":{"published":"2025-10-15T08:15:35.007","modified":"2026-10-19T21:10:00.160","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: add validation for ring_len param\n\nThe `ring_len` parameter provided by the virtual function (VF)\nis assigned directly to the hardware memory context (HMC) without\nany validation.\n\nTo address this, introduce an upper boundary check for both Tx and Rx\nqueue lengths. The maximum number of descriptors supported by the\nhardware is 8k-32.\nAdditionally, enforce alignment constraints: Tx rings must be a multiple\nof 8, and Rx rings must be a multiple of 32.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.8},"cwes":[],"references":["https://git.kernel.org/stable/c/0543d40d6513cdf1c7882811086e59a6455dfe97","https://git.kernel.org/stable/c/05fe81fb9db20464fa532a3835dc8300d68a2f84","https://git.kernel.org/stable/c/45a7527cd7da4cdcf3b06b5c0cb1cae30b5a5985","https://git.kernel.org/stable/c/55d225670def06b01af2e7a5e0446fbe946289e8","https://git.kernel.org/stable/c/7d749e38dd2b7e8a80da2ca30c93e09de95bfcf9"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-39973","score":0.00154,"percentile":0.04524,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}