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NVD / CVE Program· CNA Linux

CVE-2025-39971: i40e: fix idx validation in config queues msg

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.15% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1fa0aadade34481c567cdf4a897c0d4e4d548bd1, 2cc26dac0518d2fa9b67ec813ee60e183480f98a, 5c1f96123113e0bdc6d8dc2b0830184c93da9f65; azl3 kernel 6.6.104.2-4 on Azure Linux 3.0 6.6.112.1-1.

Low priority for now. Upgrade to Linux Linux 1fa0aadade34481c567cdf4a897c0d4e4d548bd1, 2cc26dac0518d2fa9b67ec813ee60e183480f98a, 5c1f96123113e0bdc6d8dc2b0830184c93da9f65; azl3 kernel 6.6.104.2-4 on Azure Linux 3.0 6.6.112.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: i40e: fix idx validation in config queues msg Ensure idx is within range of active/initialized TCs when iterating over vf->ch[idx] in i40e_vc_config_queues_msg().

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Oct 15, 2025
Updated
Oct 19, 2026
EPSS
0.1% · 4th percentile
CWE
—

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.17affected
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before a6ff2af78343eceb0f77ab1a2fe802183bc21648affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before f5f91d164af22e7147130ef8bebbdb28d8ecc6e2affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 1fa0aadade34481c567cdf4a897c0d4e4d548bd1affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 8b9c7719b0987b1c6c5fc910599f3618a558dbdeaffected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 2cc26dac0518d2fa9b67ec813ee60e183480f98aaffected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before bfcc1dff429d4b99ba03e40ddacc68ea4be2b32baffected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 5c1f96123113e0bdc6d8dc2b0830184c93da9f65affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before f1ad24c5abe1eaef69158bac1405a74b3c365115affected · git
    • before 4.17not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-124.16.1.el10_16.12.0-124.16.1.el10_1
AlmaLinux:10kernel-docbefore 6.12.0-124.16.1.el10_16.12.0-124.16.1.el10_1
AlmaLinux:8bpftoolbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.85.1.el8_104.18.0-553.85.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.85.1.rt7.426.el8_104.18.0-553.85.1.rt7.426.el8_10

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-39969Oct 15, 2025 · i40e: fix validation of VF state in get resources
    35Monitor
  • ← EarlierCVE-2025-39970Oct 15, 2025 · i40e: fix input validation logic for action_meta
    35Monitor
  • Later →CVE-2025-39972Oct 15, 2025 · i40e: fix idx validation in i40e_validate_queue_map
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1fa0aadade34481c567cdf4a897c0d4e4d548bd1Vendor (CNA)
Linux Linux2cc26dac0518d2fa9b67ec813ee60e183480f98aVendor (CNA)
Linux Linux5c1f96123113e0bdc6d8dc2b0830184c93da9f65Vendor (CNA)
Linux Linux8b9c7719b0987b1c6c5fc910599f3618a558dbdeVendor (CNA)
Linux Linuxa6ff2af78343eceb0f77ab1a2fe802183bc21648Vendor (CNA)
Linux Linuxbfcc1dff429d4b99ba03e40ddacc68ea4be2b32bVendor (CNA)
Linux Linuxf1ad24c5abe1eaef69158bac1405a74b3c365115Vendor (CNA)
Linux Linuxf5f91d164af22e7147130ef8bebbdb28d8ecc6e2Vendor (CNA)
azl3 kernel 6.6.104.2-4 on Azure Linux 3.06.6.112.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:bpftool4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.85.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.158-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-611.8.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+6

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records