CVE-2024-14040Hinoki check available

Network disruption and disclosure via truncated weights

Published Jul 26, 2026 · Updated Jul 26, 2026

Integer truncation in Linux Kernel before 6.12 allows local users to disrupt networking or disclose network information via ECMP configuration. The nexthop group UAPI stores each member's weight in an 8-bit field, so requested ratios above 255 cannot be represented and produce incorrect traffic weighting. Reachability requires CAP_NET_ADMIN in the network namespace and a high-fan-out CLOS deployment using nexthop weights above 255; consequences are limited to network handling.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Integer truncation in Linux Kernel before 6.12 allows local users to disrupt networking or disclose network information via ECMP configuration. The nexthop group UAPI stores each member's weight in an 8-bit field, so requested ratios above 255 cannot be represented and produce incorrect traffic weighting. Reachability requires CAP_NET_ADMIN in the network namespace and a high-fan-out CLOS deployment using nexthop weights above 255; consequences are limited to network handling.

The record

CVE
CVE-2024-14040
Published
Jul 26, 2026
Updated
Jul 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-190
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b72a6a7ab9573e06d5c2fcb92eaa28614a735bfd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b72a6a7ab9573e06d5c2fcb92eaa28614a735bfd

Published CVSS scores

7.1Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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