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CVE-2024-27399 is a race condition in the Linux kernel Bluetooth L2CAP subsystem. l2cap_chan_del() can delete an L2CAP channel and set its connection pointer to NULL while asynchronous l2cap_chan_timeout() processing is still executing. The timeout handler can subsequently dereference that cleared connection pointer while attempting to acquire its mutex, causing a kernel NULL pointer dereference. The issue is fixed upstream in Linux kernel 6.9 and has been backported by multiple vendors.
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Linux kernel Bluetooth L2CAP null-pointer dereference in the channel-timeout handler.
Linux kernel Bluetooth L2CAP null-pointer dereference in channel timeout handling.
Linux kernel Bluetooth L2CAP null-pointer dereference in channel timeout processing.
Null-pointer dereference in the Linux Bluetooth L2CAP channel timeout handler.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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