CVE-2026-68403 (GCVE-0-2026-68403)
Vulnerability from cvelistv5
Published
2026-08-10 12:04
Modified
2026-08-19 16:34
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: initialize SDIO data work before cleanup
brcmf_sdio_probe() stores the newly allocated bus in sdiodev->bus before
allocating the ordered workqueue. If that allocation fails, the function
jumps to fail and calls brcmf_sdio_remove().
brcmf_sdio_remove() unconditionally cancels bus->datawork. Initialize the
work item before the first failure path that can reach brcmf_sdio_remove(),
so the cleanup path always observes a valid work object.
This issue was found by our static analysis tool and then confirmed by
manual review of the probe error path and the remove-time work drain. The
problem pattern is an early setup failure that reaches a cleanup helper
which cancels an embedded work item before its initializer has run.
A QEMU PoC forced alloc_ordered_workqueue() to fail at the same point in
brcmf_sdio_probe(), before INIT_WORK(&bus->datawork) is reached. The
resulting fail path calls brcmf_sdio_remove(), and DEBUG_OBJECTS reports
the invalid work drain with brcmf_sdio_probe() and brcmf_sdio_remove() in
the stack.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 Version: 9982464379e81ece51ced03ebecbbcd34ea367a6 |
||
{
"containers": {
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"programFiles": [
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"versions": [
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"version": "0",
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{
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"status": "unaffected",
"version": "5.10.265",
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},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
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},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
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},
{
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"status": "unaffected",
"version": "6.12.101",
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},
{
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"status": "unaffected",
"version": "6.18.42",
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},
{
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"status": "unaffected",
"version": "7.1.6",
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{
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"version": "7.2",
"versionType": "original_commit_for_fix"
}
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}
],
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: initialize SDIO data work before cleanup\n\nbrcmf_sdio_probe() stores the newly allocated bus in sdiodev-\u003ebus before\nallocating the ordered workqueue. If that allocation fails, the function\njumps to fail and calls brcmf_sdio_remove().\n\nbrcmf_sdio_remove() unconditionally cancels bus-\u003edatawork. Initialize the\nwork item before the first failure path that can reach brcmf_sdio_remove(),\nso the cleanup path always observes a valid work object.\n\nThis issue was found by our static analysis tool and then confirmed by\nmanual review of the probe error path and the remove-time work drain. The\nproblem pattern is an early setup failure that reaches a cleanup helper\nwhich cancels an embedded work item before its initializer has run.\n\nA QEMU PoC forced alloc_ordered_workqueue() to fail at the same point in\nbrcmf_sdio_probe(), before INIT_WORK(\u0026bus-\u003edatawork) is reached. The\nresulting fail path calls brcmf_sdio_remove(), and DEBUG_OBJECTS reports\nthe invalid work drain with brcmf_sdio_probe() and brcmf_sdio_remove() in\nthe stack."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:34:54.805Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de"
},
{
"url": "https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364"
},
{
"url": "https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090"
},
{
"url": "https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a"
},
{
"url": "https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c"
},
{
"url": "https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219"
},
{
"url": "https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4"
},
{
"url": "https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0"
}
],
"title": "wifi: brcmfmac: initialize SDIO data work before cleanup",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68403",
"datePublished": "2026-08-10T12:04:23.150Z",
"dateReserved": "2026-07-30T09:28:09.390Z",
"dateUpdated": "2026-08-19T16:34:54.805Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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.
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