CVE-2026-90255Bluetooth: hci_conn: fix the SCO setup context lifetime
- 8.8HighCVSS base score
- 0.34%Exploitation in 30 daysEPSS · top 73% 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_conn: fix the SCO setup context lifetime hci_setup_sync() queues a conn_handle_t with a NULL destroy callback, so the context is only freed if hci_enhanced_setup_sync() actually runs. An entry that is cancelled instead is leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when there is no destroy callback, and hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. The context also stores a bare hci_conn pointer, so the connection can be freed while the work is queued. The dequeue in hci_conn_del() does not cover it either, as it matches on entry->data == conn and entry->data is the wrapper here. Same problem as commit 2f5d635ad590 ("Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks"). Hold the connection and release both from a destroy callback. The submission failure path drops both, since hci_cmd_sync_submit() does not call the destroy callback when it fails to queue.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 32 days later
· 32 days 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 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.34% · top 73% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 – < 37cfec41365c826d5496ef5d00c9e215eee53aa2
- affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 – < 9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27
- affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 – < a661de0ee29d0915c5e924edf91d2be2b4d35bae
- affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 – < c1fe3c74a89a7749cba3caa0dd91236049c66116
- affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 – < 4d7b1c834d2775b73c65e4888e01f5af8b477fe9
- affected e07a06b4eb417f5271d33ce2240e93c62d98b7b4 – < 42de40abe25db9211107af8896d0fd741f10648d
- affected 6.1
- unaffected < 6.1
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/37cfec41365c826d5496ef5d00c9e215eee53aa2 (opens in a new tab)
- https://git.kernel.org/stable/c/9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27 (opens in a new tab)
- https://git.kernel.org/stable/c/a661de0ee29d0915c5e924edf91d2be2b4d35bae (opens in a new tab)
- https://git.kernel.org/stable/c/c1fe3c74a89a7749cba3caa0dd91236049c66116 (opens in a new tab)
- https://git.kernel.org/stable/c/4d7b1c834d2775b73c65e4888e01f5af8b477fe9 (opens in a new tab)
- https://git.kernel.org/stable/c/42de40abe25db9211107af8896d0fd741f10648d (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-2026-81848 (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-2026-90255)Record last updated .