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NVD / CVE Program· CNA Linux

CVE-2025-39972: i40e: fix idx validation in i40e_validate_queue_map

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 34dfac0c904829967d500c51f216916ce1452957, 4d5e804a9e19b639b18fd13664dbad3c03c79e61, 50a1e2f50f6c22b93b94eb8d168a1be3c05bf5cd; 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 34dfac0c904829967d500c51f216916ce1452957, 4d5e804a9e19b639b18fd13664dbad3c03c79e61, 50a1e2f50f6c22b93b94eb8d168a1be3c05bf5cd; 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 i40e_validate_queue_map Ensure idx is within range of active/initialized TCs when iterating over vf->ch[idx] in i40e_validate_queue_map().

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Oct 15, 2025
Updated
Oct 19, 2026
EPSS
0.1% · 5th 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
total

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • 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 b6cb93a7ff208f324c7ec581d72995f80e115e0eaffected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 6f15a7b34fae75e745bdc2ec05e06ddfd0dd2f3caffected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 34dfac0c904829967d500c51f216916ce1452957affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 4d5e804a9e19b639b18fd13664dbad3c03c79e61affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before 50a1e2f50f6c22b93b94eb8d168a1be3c05bf5cdaffected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before cc4191e8ef40d2249c1b9a8617d22ec8a976b574affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before d4e3eaaa3cb3af77836d806c89cd6ebf533a7320affected · git
    • c27eac48160de72dee33d42b5a33cc7b8a2eb1f5 and later · before aa68d3c3ac8d1dcec40d52ae27e39f6d32207009affected · 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
Debian:12linuxbefore 6.1.158-16.1.158-1
Debian:13linuxbefore 6.12.57-16.12.57-1
Debian:14linuxbefore 6.16.10-16.16.10-1

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-2025-39970Oct 15, 2025 · i40e: fix input validation logic for action_meta
    35Monitor
  • ← EarlierCVE-2025-39971Oct 15, 2025 · i40e: fix idx validation in config queues msg
    35Monitor
  • Later →CVE-2025-39973Oct 15, 2025 · i40e: add validation for ring_len param
    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 Linux34dfac0c904829967d500c51f216916ce1452957Vendor (CNA)
Linux Linux4d5e804a9e19b639b18fd13664dbad3c03c79e61Vendor (CNA)
Linux Linux50a1e2f50f6c22b93b94eb8d168a1be3c05bf5cdVendor (CNA)
Linux Linux6f15a7b34fae75e745bdc2ec05e06ddfd0dd2f3cVendor (CNA)
Linux Linuxaa68d3c3ac8d1dcec40d52ae27e39f6d32207009Vendor (CNA)
Linux Linuxb6cb93a7ff208f324c7ec581d72995f80e115e0eVendor (CNA)
Linux Linuxcc4191e8ef40d2249c1b9a8617d22ec8a976b574Vendor (CNA)
Linux Linuxd4e3eaaa3cb3af77836d806c89cd6ebf533a7320Vendor (CNA)
azl3 kernel 6.6.104.2-4 on Azure Linux 3.06.6.112.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.158-1 · Debian:12Package registry (OSV)

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. SSVC exploitation— → none
  2. 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