CVE-2026-98295 Bluetooth: coredump: Quiesce dump work on unregister
A use-after-free in the Linux kernel Bluetooth coredump handler allows attackers to cause denial of service or execute code via crafted Bluetooth packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98295?
CVE-2026-98295 is an use after free vulnerability in Linux, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: coredump: Quiesce dump work on unregister
hci_devcd_handle_pkt_init() arms dump_timeout and coredump producers queue dump_rx without holding an hdev reference. Unregister leaves both works live, so disconnecting during an active dump lets them access hdev after hci_release_dev() frees it.
Shut down coredump processing during unregister. Close the producer gate under dump_q.lock before disabling both works, then free the active buffer and queued packets under hci_dev_lock. Serializing the gate with enqueue prevents controller-specific workers from adding packets after the final purge.
Which versions are affected by CVE-2026-98295?
How do I fix CVE-2026-98295?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-98295 being exploited?
There is no known exploitation of CVE-2026-98295 in the wild and no public exploit code.
Sources
Also known as AZL-106422, BELL-CVE-2026-98295, DEBIAN-CVE-2026-98295, GHSA-hf3c-2524-f4r3, UBUNTU-CVE-2026-98295.