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CVE-2026-43023 is a race-condition vulnerability in the Linux kernel Bluetooth SCO subsystem. The sco_sock_connect() function checks socket state and type without holding the socket lock, allowing two concurrent connect() calls on the same socket to enter sco_connect(). An intervening HCI disconnect can close and zap the socket before the second connecting thread reattaches it and restores BT_CONNECT. Subsequent cleanup triggers duplicate sock_put() calls and use-after-free. The race also leaks the original SCO connection after its socket association is cleared.
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A Linux kernel Bluetooth SCO vulnerability involving race conditions in sco_sock_connect(). Security updates are available for affected Rocky Linux 10.2 kernel packages.
A race condition in the Linux kernel Bluetooth SCO subsystem allows concurrent connection attempts and an HCI disconnect to revive a closed socket. Subsequent cleanup causes a double sock_put() and use-after-free; an orphaned connection also leaks. The reported CVSS v3 score is 7.8, with local access and low privileges required and potential high confidentiality, integrity, and availability impacts. The recommended fix is to update Echo linux packages to version 6.1.170-1 or later.
A vulnerability referenced in a Red Hat Enterprise Linux 9.6 kernel-package security update; the content provides no technical flaw description.
Linux kernel Bluetooth SCO race-condition flaw in sco_sock_connect().
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