net: bcmgenet: keep RBUF EEE/PM disabled

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-64125
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:54 UTC
Updated2026-07-19 16:17:54 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 2040eb83f6ada148fb32dd98b943a498005d79f2 git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 f2782ddac82c70df313012da5f71f1f06b5553ca git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 b579f3a73da7a7e74213558f4cc3d865c30aaa78 git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 289499907399c5a9f2ed82cb34df49112bb8488f git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 a212fc08f5c48a16a94092bf0a9a8b7cf4483b11 git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 3d4ef05266ab16d8ef7dd21658a557801eb78704 git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95 git Not specified
CNA Linux Linux affected 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 9a1730245e416d11ad5c0f2c100061d61cc43f60 git Not specified
CNA Linux Linux affected 3.19 Not specified
CNA Linux Linux unaffected 3.19 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.142 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.92 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f2782ddac82c70df313012da5f71f1f06b5553ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9a1730245e416d11ad5c0f2c100061d61cc43f60 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a212fc08f5c48a16a94092bf0a9a8b7cf4483b11 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b579f3a73da7a7e74213558f4cc3d865c30aaa78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/289499907399c5a9f2ed82cb34df49112bb8488f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2040eb83f6ada148fb32dd98b943a498005d79f2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3d4ef05266ab16d8ef7dd21658a557801eb78704 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report