309 lines
17 KiB
JSON
309 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64125",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T07:54:57.036Z",
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"datePublished": "2026-07-19T15:40:22.590Z",
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"dateUpdated": "2026-10-19T20:28:13.405Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:39:31.893Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The fault is reached in `bcmgenet_rx_poll` during NAPI processing of received Ethernet frames; any remote host that can send traffic to a GENET-equipped, network-connected target (e.g., internet-exposed Raspberry Pi, Broadcom gateway, or edge IoT device) can drive RX activity and LPI exit transitions that trigger the corrupted RX path.\nAC:L - On affected GENET hardware with an EEE-capable link partner (now common and enabled by default via `phy_support_eee()`), the bug reproduces within minutes under normal RX load without attacker-influenced memory layout, and the attacker controls timing by sending sustained or bursty traffic to force LPI entry/exit cycles.\nPR:N - Exploitation does not require authentication or elevated privileges; EEE is enabled automatically at link-up through `bcmgenet_mii_setup()` → `bcmgenet_eee_enable_set()`, so a remote attacker only needs the ability to send network packets to the target interface.\nUI:N - No victim action is required beyond the device having a normal link with EEE-capable equipment; the misconfigured RBUF registers and subsequent RX stall or kernel oops occur during routine background network activity.\nS:U - Impact is confined to kernel/network availability on the same host (RX path stall, skb corruption, and kernel panic); there is no demonstrated crossing of a VM, container, or IOMMU security boundary.\nC:H - Hardware RX desynchronization from incorrectly enabled `RBUF_EEE_EN|RBUF_PM_EN` corrupts skb/DMA ring state and manifests as invalid pointers in `skb_release_data` during `bcmgenet_rx_poll`, consistent with use-after-free/double-free class corruption that can enable arbitrary kernel memory disclosure.\nI:H - The same skb pointer corruption in the RX teardown path can yield heap write primitives (double-free/incorrect free of sk_buff metadata) during LPI exit, which is the class of memory corruption typically leveraged for kernel control-flow hijacking.\nA:H - The bug reliably causes complete RX failure (silent loss of connectivity while the link remains up) and can escalate to a fatal kernel oops/panic in softirq context, constituting total loss of network availability and potential full system availability loss."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/broadcom/genet/bcmgenet.c"
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],
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"versions": [
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "2040eb83f6ada148fb32dd98b943a498005d79f2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "f2782ddac82c70df313012da5f71f1f06b5553ca",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "b579f3a73da7a7e74213558f4cc3d865c30aaa78",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "289499907399c5a9f2ed82cb34df49112bb8488f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "a212fc08f5c48a16a94092bf0a9a8b7cf4483b11",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "3d4ef05266ab16d8ef7dd21658a557801eb78704",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6ef398ea60d931b97d69ed080bd0bd00fac38ec6",
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"lessThan": "9a1730245e416d11ad5c0f2c100061d61cc43f60",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/broadcom/genet/bcmgenet.c"
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],
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"versions": [
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{
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"version": "3.19",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.19",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.258",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.142",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.92",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.34",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.19",
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"versionEndExcluding": "5.10.258"
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},
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{
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"vulnerable": true,
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},
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2040eb83f6ada148fb32dd98b943a498005d79f2"
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},
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{
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"url": "https://git.kernel.org/stable/c/f2782ddac82c70df313012da5f71f1f06b5553ca"
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},
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{
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"url": "https://git.kernel.org/stable/c/b579f3a73da7a7e74213558f4cc3d865c30aaa78"
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},
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{
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"url": "https://git.kernel.org/stable/c/289499907399c5a9f2ed82cb34df49112bb8488f"
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},
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{
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"url": "https://git.kernel.org/stable/c/a212fc08f5c48a16a94092bf0a9a8b7cf4483b11"
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},
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{
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"url": "https://git.kernel.org/stable/c/3d4ef05266ab16d8ef7dd21658a557801eb78704"
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},
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{
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"url": "https://git.kernel.org/stable/c/49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a1730245e416d11ad5c0f2c100061d61cc43f60"
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}
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],
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"title": "net: bcmgenet: keep RBUF EEE/PM disabled",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-64125",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:36:46.782913Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"description": "CWE-noinfo Not enough information"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T20:28:13.405Z"
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}
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}
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]
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}
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} |