CVE-2026-80762: Bluetooth: hci_sync: Fix accept list UAF during suspend
Bluetooth: hcisync: Fix accept list UAF during suspend
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.157.1-1 - Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.190-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1 - Upgrade
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debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.113-1~deb12u1 - Upgrade
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ubuntu/linux-hwe-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42~24.04.1 - Upgrade
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ubuntu/linux-riscv-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1~24.04.1 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 7.0.0-42.42 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 7.0.0-1016.17 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 7.0.0-1016.18 - Upgrade
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ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-oem-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 7.0.0-1015.16 - Upgrade
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ubuntu/linux-riscvto a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1 - Compensating control
Fix hci_update_event_filter_sync() so it snapshots remote-wakeup addresses under hdev->lock, releases the lock before sending HCI commands, clears the controller event filter before building the snapshot, and skips allocation and the second list traversal when there are no matching entries; do not retain an accept-list node across the controller wait.
Event History
Frequently Asked Questions
When can this race occur?
It requires a Bluetooth controller suspend operation that updates the event filter for remote-wakeup devices while another operation removes an entry from the controller's accept list. The removal can free the entry while the suspend path is waiting for a synchronous HCI command to complete.
What symptoms can indicate that this issue has been triggered?
KASAN may report a slab use-after-free read in hci_suspend_sync. The reported execution context is a kernel worker handling vhci_suspend_work, with the freed object originating from remove_device().
Is a fix identified for this issue?
Yes. The vulnerability is described as resolved, and the record provides three stable-kernel commit references containing the fix. No affected or fixed kernel version numbers are provided.