net: bcmgenet: keep RBUF EEE/PM disabled
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.
CVE-2026-64125
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64125
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "2040eb83f6ada148fb32dd98b943a498005d79f2",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "f2782ddac82c70df313012da5f71f1f06b5553ca",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "b579f3a73da7a7e74213558f4cc3d865c30aaa78",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "289499907399c5a9f2ed82cb34df49112bb8488f",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "a212fc08f5c48a16a94092bf0a9a8b7cf4483b11",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "3d4ef05266ab16d8ef7dd21658a557801eb78704",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95",
"versionType": "git"
},
{
"status": "affected",
"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
"lessThan": "9a1730245e416d11ad5c0f2c100061d61cc43f60",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/broadcom/genet/bcmgenet.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/broadcom/genet/bcmgenet.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64125
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40961 · Revision 1
- Added to Heist Feed
- Publisher date