FKIE_CVE-2026-68085
Vulnerability from fkie_nvd - Published: 2026-08-10 12:17 - Updated: 2026-08-17 05:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled
HCI_UART_SENDING bit in tx_state means write_work is pending and blocks
queueing it again. Currently this bit is not cleared when canceling the
work in hci_uart_close(), which blocks future writes when device is
reopened later if write_work was pending.
Fix by clearing HCI_UART_SENDING when canceling the work.
Also make clearing of tx_skb safe by using disable_work_sync +
enable_work instead of just cancel_work_sync. hci_uart_flush() purges
the proto tx queue so we can cancel the pending write_work there,
instead of doing it just in hci_uart_close(). Re-enable and possibly
requeue the work after queue flush.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/bluetooth/hci_ldisc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d52446b3e735cfdbdc2a58342163803bc2e64249",
"status": "affected",
"version": "81c7a3c22a0f2808cf4ae0b4908f59763b23606d",
"versionType": "git"
},
{
"lessThan": "b9dd39cf1667e378b25a082ca796d495d578c5d3",
"status": "affected",
"version": "192cb0f1ca706d9a1bc36ae0ad5f666d1e4fd894",
"versionType": "git"
},
{
"lessThan": "714d861d35d937f23375a4517569b13917bbbe51",
"status": "affected",
"version": "c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b",
"versionType": "git"
},
{
"lessThan": "1b0d946d6f08bd39211385bc703a440911b41e46",
"status": "affected",
"version": "c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b",
"versionType": "git"
},
{
"status": "affected",
"version": "78aad93e938f013d9272fe0ee168f27883afa95c",
"versionType": "git"
},
{
"status": "affected",
"version": "e2d19969c8d9198ecc3090bcd5312ecd503a3339",
"versionType": "git"
},
{
"status": "affected",
"version": "c85cff648a2bc92322912db5f1727ad05afae7b6",
"versionType": "git"
},
{
"status": "affected",
"version": "9d20d48be2c4a071fb015eb09bda2cecd25daf34",
"versionType": "git"
},
{
"status": "affected",
"version": "7338031946bd06f6dff149e67b60c4cd083bfea8",
"versionType": "git"
},
{
"lessThan": "6.12.96",
"status": "affected",
"version": "6.12.92",
"versionType": "semver"
},
{
"lessThan": "6.18.39",
"status": "affected",
"version": "6.18.34",
"versionType": "semver"
},
{
"lessThan": "5.11",
"status": "affected",
"version": "5.10.258",
"versionType": "semver"
},
{
"lessThan": "5.16",
"status": "affected",
"version": "5.15.209",
"versionType": "semver"
},
{
"lessThan": "6.2",
"status": "affected",
"version": "6.1.175",
"versionType": "semver"
},
{
"lessThan": "6.7",
"status": "affected",
"version": "6.6.142",
"versionType": "semver"
},
{
"lessThan": "7.1",
"status": "affected",
"version": "7.0.11",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/bluetooth/hci_ldisc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"lessThan": "7.1",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled\n\nHCI_UART_SENDING bit in tx_state means write_work is pending and blocks\nqueueing it again. Currently this bit is not cleared when canceling the\nwork in hci_uart_close(), which blocks future writes when device is\nreopened later if write_work was pending.\n\nFix by clearing HCI_UART_SENDING when canceling the work.\n\nAlso make clearing of tx_skb safe by using disable_work_sync +\nenable_work instead of just cancel_work_sync. hci_uart_flush() purges\nthe proto tx queue so we can cancel the pending write_work there,\ninstead of doing it just in hci_uart_close(). Re-enable and possibly\nrequeue the work after queue flush."
}
],
"id": "CVE-2026-68085",
"lastModified": "2026-08-17T05:18:07.737",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.1,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-10T12:17:21.060",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1b0d946d6f08bd39211385bc703a440911b41e46"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/714d861d35d937f23375a4517569b13917bbbe51"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b9dd39cf1667e378b25a082ca796d495d578c5d3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d52446b3e735cfdbdc2a58342163803bc2e64249"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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