CVE-2026-46111High· 7.8▾ TwilightIn 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 creati…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
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().
Linux >= eca0ae4aea66914515e5e3098ea051b518ee5316 < d41093723e47255d7d74df86e2736711c1b8486eLinux >= eca0ae4aea66914515e5e3098ea051b518ee5316 < 6823f730bf195fc296d9edd09e2ca94bc1ff5584Linux >= eca0ae4aea66914515e5e3098ea051b518ee5316 < 1750a2df0eab61dc421a7afae74abdd239a44b85Linux >= eca0ae4aea66914515e5e3098ea051b518ee5316 < dc34f8d8240f25dd137dc2758ebbcc75e3779142Linux >= eca0ae4aea66914515e5e3098ea051b518ee5316 < f8eaf92c57ad99358dd372580d5ff87623343a72Linux >= eca0ae4aea66914515e5e3098ea051b518ee5316 < 0beddb0c380bed5f5b8e61ddbe14635bb73d0b41Linux 6.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-99118Nonedrm/i915/dmc: Harden DMC firmware payload parsing
CVE-2026-99117Nonenet: bridge: mcast: don't truncate the port group walk on teardown
CVE-2026-99121Noneipv4: avoid divide by zero in fib_rebalance
CVE-2026-99120NoneKVM: x86/mmu: Cope with the SS bit being set in #NPF exit codes
CVE-2026-99119Nonedrm/amdgpu/userq: actually validate userq BOs
CVE-2026-99123Nonevsock/virtio: validate packet source for connected sockets