CVE-2026-64125Network attack vector

Remote denial of service via RBUF EEE

Published Jul 19, 2026 · Updated Jul 19, 2026

Denial of service in affected Linux Kernel releases allows remote attackers to stop RX traffic or crash Broadcom GENET hosts. bcmgenet_eee_enable_set sets RBUF_EEE_EN and RBUF_PM_EN in RBUF_ENERGY_CTRL, causing RBUF to stop forwarding received frames to DMA after MAC EEE becomes active. A reachable GENET interface on an EEE-capable link is required; sustained traffic can force LPI transitions, producing silent connectivity loss and, on some boards, a kernel paging fault.

CVSS severity9.8
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in affected Linux Kernel releases allows remote attackers to stop RX traffic or crash Broadcom GENET hosts. bcmgenet_eee_enable_set sets RBUF_EEE_EN and RBUF_PM_EN in RBUF_ENERGY_CTRL, causing RBUF to stop forwarding received frames to DMA after MAC EEE becomes active. A reachable GENET interface on an EEE-capable link is required; sustained traffic can force LPI transitions, producing silent connectivity loss and, on some boards, a kernel paging fault.

The record

CVE
CVE-2026-64125
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.19
  2. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <2040eb83f6ada148fb32dd98b943a498005d79f2
  3. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <289499907399c5a9f2ed82cb34df49112bb8488f
  4. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <3d4ef05266ab16d8ef7dd21658a557801eb78704
  5. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95
  6. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <9a1730245e416d11ad5c0f2c100061d61cc43f60
  7. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <a212fc08f5c48a16a94092bf0a9a8b7cf4483b11
  8. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <b579f3a73da7a7e74213558f4cc3d865c30aaa78
  9. Affected versionversion=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <f2782ddac82c70df313012da5f71f1f06b5553ca

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.19; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <2040eb83f6ada148fb32dd98b943a498005d79f2; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <289499907399c5a9f2ed82cb34df49112bb8488f; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <3d4ef05266ab16d8ef7dd21658a557801eb78704; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <9a1730245e416d11ad5c0f2c100061d61cc43f60; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <a212fc08f5c48a16a94092bf0a9a8b7cf4483b11; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <b579f3a73da7a7e74213558f4cc3d865c30aaa78; version=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <f2782ddac82c70df313012da5f71f1f06b5553ca

Published CVSS scores

9.8LinuxCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo