Answer in brief
CVE-2026-64125 records a Unknown severity vulnerability in net: bcmgenet: keep RBUF EEE/PM disabled. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-64125 records a Unknown severity vulnerability in net: bcmgenet: keep RBUF EEE/PM disabled. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <2040eb83f6ada148fb32dd98b943a498005d79f2 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <f2782ddac82c70df313012da5f71f1f06b5553ca || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <b579f3a73da7a7e74213558f4cc3d865c30aaa78 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <289499907399c5a9f2ed82cb34df49112bb8488f || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <a212fc08f5c48a16a94092bf0a9a8b7cf4483b11 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <3d4ef05266ab16d8ef7dd21658a557801eb78704 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <9a1730245e416d11ad5c0f2c100061d61cc43f60 | 2040eb83f6ada148fb32dd98b943a498005d79f2, f2782ddac82c70df313012da5f71f1f06b5553ca, b579f3a73da7a7e74213558f4cc3d865c30aaa78, 289499907399c5a9f2ed82cb34df49112bb8488f, a212fc08f5c48a16a94092bf0a9a8b7cf4483b11, 3d4ef05266ab16d8ef7dd21658a557801eb78704, 49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95, 9a1730245e416d11ad5c0f2c100061d61cc43f60 |
| Linux/Linuxgeneric | 3.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <2040eb83f6ada148fb32dd98b943a498005d79f2 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <f2782ddac82c70df313012da5f71f1f06b5553ca || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <b579f3a73da7a7e74213558f4cc3d865c30aaa78 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <289499907399c5a9f2ed82cb34df49112bb8488f || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <a212fc08f5c48a16a94092bf0a9a8b7cf4483b11 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <3d4ef05266ab16d8ef7dd21658a557801eb78704 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95 || >=6ef398ea60d931b97d69ed080bd0bd00fac38ec6 <9a1730245e416d11ad5c0f2c100061d61cc43f60 | 2040eb83f6ada148fb32dd98b943a498005d79f2, f2782ddac82c70df313012da5f71f1f06b5553ca, b579f3a73da7a7e74213558f4cc3d865c30aaa78, 289499907399c5a9f2ed82cb34df49112bb8488f, a212fc08f5c48a16a94092bf0a9a8b7cf4483b11, 3d4ef05266ab16d8ef7dd21658a557801eb78704, 49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95, 9a1730245e416d11ad5c0f2c100061d61cc43f60 |
| Linux/Linuxgeneric | 3.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.