8.8

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

Deferred
AliasesUBUNTU-CVE-2025-39973DEBIAN-CVE-2025-39973
Published 15-10-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-39973 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 129 · Related 112
DLA-4379-1DLA-4404-1DSA-6053-1MGASA-2025-0309MGASA-2025-0310OPENSUSE-SU-2025:20091-1

Showing 100 of 129.

Timeline

  1. 15-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.15% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu147 products
  • linuxAll versions (No fix recorded) | < 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-6.6
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1100.107 | < 6.8.0-1050.53 | < 6.17.0-1003.3
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.16.10-1
Linux1 product
  • linux≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < 0543d40d6513cdf1c7882811086e59a6455dfe97 | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < 7d749e38dd2b7e8a80da2ca30c93e09de95bfcf9 | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < 45a7527cd7da4cdcf3b06b5c0cb1cae30b5a5985 | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < d3b0d3f8d11fa957171fbb186e53998361a88d4e | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < c0c83f4cd074b75cecef107bfc349be7d516c9c4 | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < 05fe81fb9db20464fa532a3835dc8300d68a2f84 | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < afec12adab55d10708179a64d95d650741e60fe0 | ≥ 5c3c48ac6bf56367c4e89f6453cd2d61e50375bd, < 55d225670def06b01af2e7a5e0446fbe946289e8 | 3.12

3 vendors · 149 products

References

37 links
Show all 37 references