CVE-2026-64408

Summary

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: bnep: pin L2CAP connection during netdev registration

bnep_add_connection() reads the L2CAP connection without holding the channel lock, then passes its HCI device to register_netdev(). Controller teardown can clear and release that connection concurrently, leaving the network device registration path to dereference a freed parent device.

Take a reference to the L2CAP connection while holding the channel lock. Retain it until register_netdev() has taken the parent device reference.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < 390b5db3ff8745187f094c4e915663b7b1f98944affected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < 46a88784c4c9b96954dd86f747ce93f65efa1302affected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < 551ae773ec64045b4e72099132654887e0270bccaffected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < ae215c5b6422d8eda443b861b124bd1be6969c31affected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < df22adc7eafc22e651561813c11dc51a796b12eeaffected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < a6b22dbd80926556290ad2243be25218d6956a19affected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < 563a8573047182f550b1e1e030615755cd8c41daaffected
LinuxLinux65f53e9802dbfae0e5758a91793c3f5f8bece49b < bb067a99a0356196c0b89a95721985485ebce5a5affected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc3 <= *unaffected

Weaknesses

References