CVE-2026-68139 (GCVE-0-2026-68139)
Vulnerability from cvelistv5
Published
2026-08-10 11:59
Modified
2026-08-17 04:59
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Use sender devcom for MPV master-up
After PCIe DPC recovery, mlx5 reloads the affected functions and
replays multiport affiliation events. In the reported failure, the
first relevant device error was:
pcieport 0000:10:01.1: DPC: containment event
pcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)
pcieport 0000:10:01.1: [ 5] SDES (First)
mlx5 recovered the PCI functions and resumed 0000:11:00.1. During
that resume, RDMA multiport binding replayed
MLX5_DRIVER_EVENT_AFFILIATION_DONE and mlx5e sent
MPV_DEVCOM_MASTER_UP. The host then panicked with:
BUG: kernel NULL pointer dereference, address: 0000000000000010
RIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]
RDI: 0000000000000000
Call trace included:
mlx5_devcom_comp_set_ready
mlx5e_devcom_event_mpv
mlx5_devcom_send_event
mlx5_ib_bind_slave_port
mlx5r_mp_probe
mlx5_pci_resume
MPV devcom registration publishes mlx5e private data to the component
peer list before mlx5e_devcom_init_mpv() stores the returned component
device in priv->devcom. A concurrent master-up event can therefore
reach a peer whose private data is visible but whose priv->devcom
backpointer is still NULL.
MPV_DEVCOM_MASTER_UP already carries the sender/master mlx5e private
data as event_data. The ready bit is stored on the shared devcom
component, not on an individual peer. Use the sender devcom when
marking the MPV component ready.
This preserves the readiness transition while avoiding a NULL
dereference of the peer devcom pointer during affiliation replay after
PCI error recovery.
References
| URL | Tags | |
|---|---|---|
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/mellanox/mlx5/core/en_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c698b2735613f1f35c55688bd2252f75f31c49ad",
"status": "affected",
"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23",
"versionType": "git"
},
{
"lessThan": "40f9a124ebbe0d60fe165fb3f87515c35b2d72f5",
"status": "affected",
"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23",
"versionType": "git"
},
{
"lessThan": "a60c81f168c9fe4f5d84302d1e32b717f5a8a933",
"status": "affected",
"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23",
"versionType": "git"
},
{
"lessThan": "e32649b4bad90a6216d8e93cd7dd050af8ac9740",
"status": "affected",
"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/mellanox/mlx5/core/en_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "6.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use sender devcom for MPV master-up\n\nAfter PCIe DPC recovery, mlx5 reloads the affected functions and\nreplays multiport affiliation events. In the reported failure, the\nfirst relevant device error was:\n\n pcieport 0000:10:01.1: DPC: containment event\n pcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)\n pcieport 0000:10:01.1: [ 5] SDES (First)\n\nmlx5 recovered the PCI functions and resumed 0000:11:00.1. During\nthat resume, RDMA multiport binding replayed\nMLX5_DRIVER_EVENT_AFFILIATION_DONE and mlx5e sent\nMPV_DEVCOM_MASTER_UP. The host then panicked with:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n RIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]\n RDI: 0000000000000000\n\nCall trace included:\n\n mlx5_devcom_comp_set_ready\n mlx5e_devcom_event_mpv\n mlx5_devcom_send_event\n mlx5_ib_bind_slave_port\n mlx5r_mp_probe\n mlx5_pci_resume\n\nMPV devcom registration publishes mlx5e private data to the component\npeer list before mlx5e_devcom_init_mpv() stores the returned component\ndevice in priv-\u003edevcom. A concurrent master-up event can therefore\nreach a peer whose private data is visible but whose priv-\u003edevcom\nbackpointer is still NULL.\n\nMPV_DEVCOM_MASTER_UP already carries the sender/master mlx5e private\ndata as event_data. The ready bit is stored on the shared devcom\ncomponent, not on an individual peer. Use the sender devcom when\nmarking the MPV component ready.\n\nThis preserves the readiness transition while avoiding a NULL\ndereference of the peer devcom pointer during affiliation replay after\nPCI error recovery."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:59:32.634Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c698b2735613f1f35c55688bd2252f75f31c49ad"
},
{
"url": "https://git.kernel.org/stable/c/40f9a124ebbe0d60fe165fb3f87515c35b2d72f5"
},
{
"url": "https://git.kernel.org/stable/c/a60c81f168c9fe4f5d84302d1e32b717f5a8a933"
},
{
"url": "https://git.kernel.org/stable/c/e32649b4bad90a6216d8e93cd7dd050af8ac9740"
}
],
"title": "net/mlx5e: Use sender devcom for MPV master-up",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68139",
"datePublished": "2026-08-10T11:59:02.768Z",
"dateReserved": "2026-07-30T09:28:09.370Z",
"dateUpdated": "2026-08-17T04:59:32.634Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…