CVE-2026-68403
Status: ReceivedUnscored—
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.
Read full descriptionShow less
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.
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.22%
- Percentile among all scored CVEs: 11
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
- https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0
- https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219
- https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c
- https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de
- https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364
- https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4
- https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a
- https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090
Raw JSON (NVD)
Show
{
"id": "CVE-2026-68403",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "860887d22890417d43ef8298f0cc4865e29b54de",
"versionType": "git"
},
{
"status": "affected",
"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "9a4be91e5bb032b34cb3c962f6d4f82e7ef09364",
"versionType": "git"
},
{
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"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "fb12c87ae855346321af72e57a93c146205f1090",
"versionType": "git"
},
{
"status": "affected",
"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "f50a2b9e57a751e70ae9a272875d80d39eaccd6a",
"versionType": "git"
},
{
"status": "affected",
"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "6bd21ec8549a5854dd64204a66289952917a924c",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "5c342437ea44bb829680ca9e4f683dd5b325b219",
"versionType": "git"
},
{
"status": "affected",
"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "c73c3fc1c7ca5a927639f0884624cb244ba791e4",
"versionType": "git"
},
{
"status": "affected",
"version": "9982464379e81ece51ced03ebecbbcd34ea367a6",
"lessThan": "2a665946e0407a05a3f81bd56a08553c446498e0",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-10T13:20:33.830",
"references": [
{
"url": "https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"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->bus 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->datawork. 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(&bus->datawork) 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."
}
],
"lastModified": "2026-08-19T17:20:48.187",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}