CVE-2026-46111
- Source
- https://cve.org/CVERecord?id=CVE-2026-46111
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-46111.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-46111
- Downstream
- Related
- Published
- 2026-05-28T09:35:19Z
- Modified
- 2026-08-21T03:30:36Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Bluetooth: hci_conn: fix potential UAF in create_big_sync
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_conn: fix potential UAF in create_big_sync
Add hci_conn_valid() check in create_big_sync() to detect stale connections before proceeding with BIG creation. Handle the resulting -ECANCELED in create_big_complete() and re-validate the connection under hci_dev_lock() before dereferencing, matching the pattern used by create_le_conn_complete() and create_pa_complete().
Keep the hci_conn object alive across the async boundary by taking a reference via hci_conn_get() when queueing create_big_sync(), and dropping it in the completion callback. The refcount and the lock are complementary: the refcount keeps the object allocated, while hci_dev_lock() serializes hci_conn_hash_del()'s list_del_rcu() on hdev->conn_hash, as required by hci_conn_del().
hci_conn_put() is called outside hci_dev_unlock() so the final put (which resolves to kfree() via bt_link_release) does not run under hdev->lock, though the release path would be safe either way.
Without this, create_big_complete() would unconditionally dereference the conn pointer on error, causing a use-after-free via hci_connect_cfm() and hci_conn_del().
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46111.json" }- References
-
- https://git.kernel.org/stable/c/0beddb0c380bed5f5b8e61ddbe14635bb73d0b41
- https://git.kernel.org/stable/c/1750a2df0eab61dc421a7afae74abdd239a44b85
- https://git.kernel.org/stable/c/6823f730bf195fc296d9edd09e2ca94bc1ff5584
- https://git.kernel.org/stable/c/d41093723e47255d7d74df86e2736711c1b8486e
- https://git.kernel.org/stable/c/dc34f8d8240f25dd137dc2758ebbcc75e3779142
- https://git.kernel.org/stable/c/f8eaf92c57ad99358dd372580d5ff87623343a72
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46111.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-46111
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedeca0ae4aea66914515e5e3098ea051b518ee5316Fixedd41093723e47255d7d74df86e2736711c1b8486eFixed6823f730bf195fc296d9edd09e2ca94bc1ff5584Fixed1750a2df0eab61dc421a7afae74abdd239a44b85Fixeddc34f8d8240f25dd137dc2758ebbcc75e3779142Fixedf8eaf92c57ad99358dd372580d5ff87623343a72Fixed0beddb0c380bed5f5b8e61ddbe14635bb73d0b41
Linux / Kernel
Package
- Name
- Kernel