CVE-2026-64125 (GCVE-0-2026-64125)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-20 13:43
VLAI
Title
net: bcmgenet: keep RBUF EEE/PM disabled
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < 2040eb83f6ada148fb32dd98b943a498005d79f2 (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < f2782ddac82c70df313012da5f71f1f06b5553ca (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < b579f3a73da7a7e74213558f4cc3d865c30aaa78 (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < 289499907399c5a9f2ed82cb34df49112bb8488f (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < a212fc08f5c48a16a94092bf0a9a8b7cf4483b11 (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < 3d4ef05266ab16d8ef7dd21658a557801eb78704 (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < 49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95 (git)
Affected: 6ef398ea60d931b97d69ed080bd0bd00fac38ec6 , < 9a1730245e416d11ad5c0f2c100061d61cc43f60 (git)
Create a notification for this product.
Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/genet/bcmgenet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2040eb83f6ada148fb32dd98b943a498005d79f2",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "f2782ddac82c70df313012da5f71f1f06b5553ca",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "b579f3a73da7a7e74213558f4cc3d865c30aaa78",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "289499907399c5a9f2ed82cb34df49112bb8488f",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "a212fc08f5c48a16a94092bf0a9a8b7cf4483b11",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "3d4ef05266ab16d8ef7dd21658a557801eb78704",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            },
            {
              "lessThan": "9a1730245e416d11ad5c0f2c100061d61cc43f60",
              "status": "affected",
              "version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/genet/bcmgenet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.142",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.92",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:43:36.374Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2040eb83f6ada148fb32dd98b943a498005d79f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/f2782ddac82c70df313012da5f71f1f06b5553ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/b579f3a73da7a7e74213558f4cc3d865c30aaa78"
        },
        {
          "url": "https://git.kernel.org/stable/c/289499907399c5a9f2ed82cb34df49112bb8488f"
        },
        {
          "url": "https://git.kernel.org/stable/c/a212fc08f5c48a16a94092bf0a9a8b7cf4483b11"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d4ef05266ab16d8ef7dd21658a557801eb78704"
        },
        {
          "url": "https://git.kernel.org/stable/c/49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a1730245e416d11ad5c0f2c100061d61cc43f60"
        }
      ],
      "title": "net: bcmgenet: keep RBUF EEE/PM disabled",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64125",
    "datePublished": "2026-07-19T15:40:22.590Z",
    "dateReserved": "2026-07-19T07:54:57.036Z",
    "dateUpdated": "2026-07-20T13:43:36.374Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64125",
      "date": "2026-07-21",
      "epss": "0.00559",
      "percentile": "0.4289"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64125\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T16:17:54.130\",\"lastModified\":\"2026-07-20T15:17:11.160\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/broadcom/genet/bcmgenet.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/broadcom/genet/bcmgenet.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.142\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.92\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2040eb83f6ada148fb32dd98b943a498005d79f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/289499907399c5a9f2ed82cb34df49112bb8488f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3d4ef05266ab16d8ef7dd21658a557801eb78704\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9a1730245e416d11ad5c0f2c100061d61cc43f60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a212fc08f5c48a16a94092bf0a9a8b7cf4483b11\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b579f3a73da7a7e74213558f4cc3d865c30aaa78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f2782ddac82c70df313012da5f71f1f06b5553ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-20T17:09:04+00:00",
      "cve": "CVE-2026-64125",
      "id": "CVE-2026-64125",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: bcmgenet: keep RBUF EEE/PM disabled",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64125.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.