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CVE-2026-46056 is a Linux kernel Bluetooth vulnerability in the hci_event subsystem affecting the SSP passkey handlers hci_user_passkey_notify_evt() and hci_keypress_notify_evt(). The flaw is caused by insufficient locking around hci_conn lookup and subsequent field access: the connection object was accessed without keeping the hdev lock across the full lifetime of that usage, allowing the underlying hci_conn structure to be freed concurrently. This creates a race-driven use-after-free condition in kernel space during processing of Bluetooth SSP passkey-related events. The upstream fix extends the hci_dev_lock critical section to cover all connection usage in both handlers and preserves existing keypress notification behavior by routing early exits through a common unlock path.
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9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel potential use-after-free vulnerability in Bluetooth hci_event SSP passkey handlers.
A Linux kernel potential use-after-free vulnerability in Bluetooth hci_event SSP passkey handlers.
A Linux kernel Bluetooth vulnerability involving a potential use-after-free in SSP passkey handlers due to insufficient locking around hci_conn lookup and access.
A Linux kernel Bluetooth vulnerability involving a potential use-after-free in hci_event SSP passkey handlers.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.