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CVE-2026-64125— net: bcmgenet: keep RBUF EEE/PM disabled

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于GENET硬件上RBUF EEE/PM功能设置，导致RX路径中断，可能造成流量停止和服务崩溃。以下版本受到影响：3.19版本。

CVSS 9.8 · Critical EPSS 0.55% · P45

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6ef398ea60d931b97d69ed080bd0bd00fac38ec6< 2040eb83f6ada148fb32dd98b943a498005d79f2 affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< f2782ddac82c70df313012da5f71f1f06b5553ca affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< b579f3a73da7a7e74213558f4cc3d865c30aaa78 affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< 289499907399c5a9f2ed82cb34df49112bb8488f affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< a212fc08f5c48a16a94092bf0a9a8b7cf4483b11 affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< 3d4ef05266ab16d8ef7dd21658a557801eb78704 affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< 49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95 affected
6ef398ea60d931b97d69ed080bd0bd00fac38ec6< 9a1730245e416d11ad5c0f2c100061d61cc43f60 affected
… +10 more rows
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I. Basic Information for CVE-2026-64125

Vulnerability Information
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Vulnerability Title
net: bcmgenet: keep RBUF EEE/PM disabled
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: keep RBUF EEE/PM disabled Setting RBUF_EEE_EN | RBUF_PM_EN in RBUF_ENERGY_CTRL breaks the RX path on GENET hardware once MAC EEE becomes active. RX traffic stops flowing while the link stays up and the usual descriptor/RX error counters remain quiet. In that state the MAC still accepts frames (rbuf_ovflow_cnt keeps climbing) but RBUF no longer forwards them to DMA, so rx_packets is no longer incremented at the netdev level. On some boards the corruption ends up as a paging fault in skb_release_data via bcmgenet_rx_poll on an LPI exit. Reproduced on Pi 4B (BCM2711 + BCM54213PE) and confirmed by Florian Fainelli on an internal Broadcom 4908-family board with the same crash signature. RBUF_PM_EN is not publicly documented. This shows up more often now that phy_support_eee() enables EEE by default, but it also affects older kernels as soon as TX LPI is turned on via ethtool, so it is not specific to recent changes. Always clear RBUF_EEE_EN | RBUF_PM_EN in bcmgenet_eee_enable_set so the bits stay off across resets. UMAC and TBUF setup is left alone so TX-side EEE keeps working.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于GENET硬件上RBUF EEE/PM功能设置，导致RX路径中断，可能造成流量停止和服务崩溃。以下版本受到影响：3.19版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 ~ 2040eb83f6ada148fb32dd98b943a498005d79f2 -
Linux Linux 3.19 -

II. Public POCs for CVE-2026-64125

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III. Intelligence Information for CVE-2026-64125

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Patches & Fixes for CVE-2026-64125 (8)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64136 9.8 CRITICAL smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-53399 9.8 CRITICAL nfsd: release layout stid on setlease failure
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-63886 9.8 CRITICAL scsi: target: iscsi: Validate CHAP_R length before base64 decode
CVE-2026-63924 9.8 CRITICAL ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64066 9.8 CRITICAL netfs: Fix netfs_read_to_pagecache() to pause on subreq failure
CVE-2026-64061 9.8 CRITICAL netfs: Fix early put of sink folio in netfs_read_gaps()
CVE-2026-64056 9.8 CRITICAL net: ethernet: cortina: Make RX SKB per-port
CVE-2026-63984 9.8 CRITICAL ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-64055 9.8 CRITICAL net: ethernet: cortina: Carry over frag counter
CVE-2026-64102 9.8 CRITICAL RDMA/siw: Reject MPA FPDU length underflow before signed receive math
CVE-2026-64046 9.8 CRITICAL net: tls: prevent chain-after-chain in plain text SG
CVE-2026-63825 9.8 CRITICAL gcov: use atomic counter updates to fix concurrent access crashes
CVE-2026-64122 9.8 CRITICAL net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64125

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