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CVE-2023-53673 is a use-after-free vulnerability in the Linux kernel Bluetooth HCI event subsystem. In the vulnerable hci_cs_disconnect path, the kernel can delete an HCI connection object even when a disconnect command fails. ISO, L2CAP, and SCO connection paths may retain references to that object without acquiring an hci_conn reference. If the disconnect-confirmation callback is not invoked before deletion, dependent connection state is not cleaned up and later Bluetooth socket activity can dereference freed connection memory. The fix invokes the disconnect callback before deleting the HCI connection.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
25 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel Bluetooth vulnerability in hci_event related to disconnect callback handling before deleting a connection.
A Linux kernel Bluetooth hci_event flaw involving disconnect callback ordering before connection deletion.
A Linux kernel Bluetooth vulnerability involving hci_event disconnect callback handling.
A Linux kernel Bluetooth vulnerability in hci_event related to connection disconnect callback handling.
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.