CVE-2026-68085Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled
- 8.0HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.0.
Affected products
- affected 81c7a3c22a0f2808cf4ae0b4908f59763b23606d – < d52446b3e735cfdbdc2a58342163803bc2e64249
- affected 192cb0f1ca706d9a1bc36ae0ad5f666d1e4fd894 – < b9dd39cf1667e378b25a082ca796d495d578c5d3
- affected c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b – < 714d861d35d937f23375a4517569b13917bbbe51
- affected c1bb9336ae6b54a5f6a353c4bd4ed9a4307e429b – < 1b0d946d6f08bd39211385bc703a440911b41e46
- affected 78aad93e938f013d9272fe0ee168f27883afa95c
- affected e2d19969c8d9198ecc3090bcd5312ecd503a3339
- affected c85cff648a2bc92322912db5f1727ad05afae7b6
- affected 9d20d48be2c4a071fb015eb09bda2cecd25daf34
- affected 7338031946bd06f6dff149e67b60c4cd083bfea8
- affected 6.12.92 – < 6.12.96
- affected 6.18.34 – < 6.18.39
- affected 5.10.258 – < 5.11
- affected 5.15.209 – < 5.16
- affected 6.1.175 – < 6.2
- affected 6.6.142 – < 6.7
- affected 7.0.11 – < 7.1
- affected 7.1
- unaffected < 7.1
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/d52446b3e735cfdbdc2a58342163803bc2e64249 (opens in a new tab)
- https://git.kernel.org/stable/c/b9dd39cf1667e378b25a082ca796d495d578c5d3 (opens in a new tab)
- https://git.kernel.org/stable/c/714d861d35d937f23375a4517569b13917bbbe51 (opens in a new tab)
- https://git.kernel.org/stable/c/1b0d946d6f08bd39211385bc703a440911b41e46 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55266 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68085)Record last updated .