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Vulnerabilities

Vulnerability · CVE-2025-39973

In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The parameter provided by the virtual function (VF) is assigned directly

Published Oct 15, 2025 · catalog updated Oct 15, 2026 · Linux Linux

Check if you run it

No confirmed exploitation is on record for CVE-2025-39973. EPSS is 0.15%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.15%
Remediation
Vendor / distro source
Affected products
vendor Linux Linux patch: 6.17

In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux patch: 6.17patch: 6.17

How to fix CVE-2025-39973

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-39973. EPSS is 0.15%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux patch: 6.17 patch: 6.17. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.15%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2025 · NIST NVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The 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. Add

  2. Oct 15, 2026 · NIST NVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The 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. Add

Sources

  • CVE.orgVulnerability recordCVE-2025-39973

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-39973

    30-day exploitation probability 0.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-34599

    In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The 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 bo

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2025-39973

    In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The parameter provided by the virtual function (VF) is assigned directly to the hardware memory context (HMC) without any validation. To address this, introdu

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.