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CVE Record

CVE-2026-68085: Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled

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.

HighCVSS 8Not KEV-listedUpdated
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Potential ATT&CK relevance

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Vulnerability profileCVE Program record
Severity
High
CVSS
8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1CVSS vectors
3Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.15.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

8High
CVSS 3.1 vector shape for CVE-2026-68085Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

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  2. CVE publishedCVE Program

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  3. CVE updatedCVE Program

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ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux81c7a3c22a0f2808cf4ae0b4908f59763b23606d, 192cb0f1ca706d9a1bc36ae0ad5f666d1e4fd894, c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b, c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b, 78aad93e938f013d9272fe0ee168f27883afa95c, e2d19969c8d9198ecc3090bcd5312ecd503a3339, c85cff648a2bc92322912db5f1727ad05afae7b6, 9d20d48be2c4a071fb015eb09bda2cecd25daf34, 7338031946bd06f6dff149e67b60c4cd083bfea8, 6.12.92, 6.18.34, 5.10.258, 5.15.209, 6.1.175, 6.6.142, 7.0.11unaffected
LinuxLinux7.1, 0, 6.12.96, 6.18.39, 7.1.4, 7.2affected
Weakness

CWE details

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Improper Locking

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