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A use-after-free flaw in the Linux kernel Bluetooth L2CAP receive path arises from a race between SDU reassembly and socket receive processing. l2cap_reassemble_sdu() can queue an SKB to a socket, after which a concurrent bt_sock_recvmsg() invocation can dequeue and free that SKB. Subsequent L2CAP receive-state processing may continue to access struct l2cap_ctrl held in the freed SKB control buffer, resulting in a use-after-free read in l2cap_rx_state_recv. The fix preserves a local copy of the L2CAP control structure rather than accessing it after reassembly returns.
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A CVE listed in the advisory references, but the provided content does not describe the underlying vulnerability.
A CVE referenced by the Red Hat Enterprise Linux 7 kernel security advisory; the supplied content does not describe the flaw.
Unknown; the advisory lists this CVE but provides no vulnerability description.
An important Linux kernel Bluetooth L2CAP use-after-free vulnerability (CWE-416). It results from a race condition involving l2cap_reassemble_sdu and socket receive processing while Bluetooth is in use, with potential confidentiality, integrity, and availability impact. Red Hat assigns CVSS 7.1 for its products.
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Cross-references every affected SKU, including bundled OEM variants.
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