{"id":"CVE-2026-64125","summary":"net: bcmgenet: keep RBUF EEE/PM disabled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: keep RBUF EEE/PM disabled\n\nSetting RBUF_EEE_EN | RBUF_PM_EN in RBUF_ENERGY_CTRL breaks the RX\npath on GENET hardware once MAC EEE becomes active. RX traffic stops\nflowing while the link stays up and the usual descriptor/RX error\ncounters remain quiet. In that state the MAC still accepts frames\n(rbuf_ovflow_cnt keeps climbing) but RBUF no longer forwards them to\nDMA, so rx_packets is no longer incremented at the netdev level. On\nsome boards the corruption ends up as a paging fault in\nskb_release_data via bcmgenet_rx_poll on an LPI exit.\n\nReproduced on Pi 4B (BCM2711 + BCM54213PE) and confirmed by Florian\nFainelli on an internal Broadcom 4908-family board with the same crash\nsignature. RBUF_PM_EN is not publicly documented.\n\nThis shows up more often now that phy_support_eee() enables EEE by\ndefault, but it also affects older kernels as soon as TX LPI is\nturned on via ethtool, so it is not specific to recent changes.\n\nAlways clear RBUF_EEE_EN | RBUF_PM_EN in bcmgenet_eee_enable_set so\nthe bits stay off across resets. UMAC and TBUF setup is left alone so\nTX-side EEE keeps working.","modified":"2026-07-22T03:31:59.026365546Z","published":"2026-07-19T15:40:22.590Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64125.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2040eb83f6ada148fb32dd98b943a498005d79f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/289499907399c5a9f2ed82cb34df49112bb8488f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3d4ef05266ab16d8ef7dd21658a557801eb78704"},{"type":"WEB","url":"https://git.kernel.org/stable/c/49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a1730245e416d11ad5c0f2c100061d61cc43f60"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a212fc08f5c48a16a94092bf0a9a8b7cf4483b11"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b579f3a73da7a7e74213558f4cc3d865c30aaa78"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2782ddac82c70df313012da5f71f1f06b5553ca"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64125.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64125"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6ef398ea60d931b97d69ed080bd0bd00fac38ec6"},{"fixed":"2040eb83f6ada148fb32dd98b943a498005d79f2"},{"fixed":"f2782ddac82c70df313012da5f71f1f06b5553ca"},{"fixed":"b579f3a73da7a7e74213558f4cc3d865c30aaa78"},{"fixed":"289499907399c5a9f2ed82cb34df49112bb8488f"},{"fixed":"a212fc08f5c48a16a94092bf0a9a8b7cf4483b11"},{"fixed":"3d4ef05266ab16d8ef7dd21658a557801eb78704"},{"fixed":"49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95"},{"fixed":"9a1730245e416d11ad5c0f2c100061d61cc43f60"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64125.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.19.0"},{"fixed":"5.10.258"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.142"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.92"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64125.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}