High 8.8Published Oct 15, 2025

CVE-2025-39973i40e: add validation for ring_len param

Updated under an hour ago (Oct 28, 2026, 12:23 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The `ring_len` parameter provided by the virtual function (VF) is assigned directly to the hardware memory context (HMC) without any validation. To address this, introduce an upper boundary check for both Tx and Rx queue lengths. The maximum number of descriptors supported by the hardware is 8k-32. Additionally, enforce alignment constraints: Tx rings must be a multiple of 8, and Rx rings must be a multiple of 32.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before 0543d40d6513cdf1c7882811086e59a6455dfe97; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before 7d749e38dd2b7e8a80da2ca30c93e09de95bfcf9; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before 45a7527cd7da4cdcf3b06b5c0cb1cae30b5a5985; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before d3b0d3f8d11fa957171fbb186e53998361a88d4e; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before c0c83f4cd074b75cecef107bfc349be7d516c9c4; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before 05fe81fb9db20464fa532a3835dc8300d68a2f84; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before afec12adab55d10708179a64d95d650741e60fe0; from 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd before 55d225670def06b01af2e7a5e0446fbe946289e8	CNA record

References

References

https://git.kernel.org/stable/c/0543d40d6513cdf1c7882811086e59a6455dfe97
https://git.kernel.org/stable/c/7d749e38dd2b7e8a80da2ca30c93e09de95bfcf9
https://git.kernel.org/stable/c/45a7527cd7da4cdcf3b06b5c0cb1cae30b5a5985
https://git.kernel.org/stable/c/d3b0d3f8d11fa957171fbb186e53998361a88d4e
https://git.kernel.org/stable/c/c0c83f4cd074b75cecef107bfc349be7d516c9c4
https://git.kernel.org/stable/c/05fe81fb9db20464fa532a3835dc8300d68a2f84
https://git.kernel.org/stable/c/afec12adab55d10708179a64d95d650741e60fe0
https://git.kernel.org/stable/c/55d225670def06b01af2e7a5e0446fbe946289e8

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.