CVE-2026-99091None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix status of pending commands flushed on power off cmd_complete_rsp() receives a struct cmd_lookup and, for a pending command that has no cmd_complet…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: MGMT: Fix status of pending commands flushed on power off
cmd_complete_rsp() receives a struct cmd_lookup and, for a pending command that has no cmd_complete callback, falls through to cmd_status_rsp(cmd, data). cmd_status_rsp() reads data as a u8 *, so the status sent comes from the first byte of match->sk's representation, not from match->mgmt_status.
commit f53e1c9c726d ("Bluetooth: MGMT: Fix possible crash on mgmt_index_removed") changed the callers' data from &status to &match and updated the cmd_complete branch to match->mgmt_status, but left the fall-through passing data unchanged.
In mgmt_index_removed() match->sk is NULL, so every such command is answered with status 0x00 (Success) instead of MGMT_STATUS_INVALID_INDEX. In __mgmt_power_off() it is NULL too, unless a Set Powered command was pending: then settings_rsp() has stored that command's socket in match->sk, and the byte sent comes from the socket pointer. Either way the status the caller set, MGMT_STATUS_NOT_POWERED (or MGMT_STATUS_INVALID_INDEX when the device is being unregistered), is lost.
Pass the status the callers set.
This was seen on a QCA9377 laptop: bluetoothd's Start Discovery, pending when the adapter was powered off, was answered with Command Status 0x00 and no parameters, and bluetoothd 5.72 crashed on the zero-length success. BlueZ master has since added the length check on that path ("adapter: Fix crash on short start discovery reply", BlueZ a734b06059cb), but userspace should still be told Not Powered, not Success.
Tested on Ubuntu 7.0.0-31 with a virtual controller (hci_vhci): power off is held in HCI Write Scan Enable while a Start Discovery is submitted, and the flush answers it with status 0x00 before this change and 0x0f (Not Powered) after.
Linux >= 4883296505aa7e4863c6869b689afb6005633b23 < 44ce36c5789ac84e65de1e98c32db9a5ac04ed47Linux >= f53e1c9c726d83092167f2226f32bd3b73f26c21 < 7ed7e038b520cf0dfa12d61c2caddb95e2f6922dLinux >= f53e1c9c726d83092167f2226f32bd3b73f26c21 < ec227cddd13cd7ac9077d263a73473ac370a055dLinux >= f53e1c9c726d83092167f2226f32bd3b73f26c21 < 07976405a3c71253e50533ee7b7a8b0dc16ab6baLinux >= f53e1c9c726d83092167f2226f32bd3b73f26c21 < 86ef0f58bdecdedb3a1240971c56d71b7e4ce3fcLinux 19b40ca62607cef78369549d1af091f2fd558931Linux 0cc47233af35fb5f10b5e6a027cb4ccd480caf9aLinux 8c3f7943a29145d8a2d8e24893762f7673323eaeLinux >= 6.6.55 < 6.6.160Linux >= 6.1.120 < 6.2Linux >= 6.10.14 < 6.11Linux >= 6.11.3 < 6.12Linux 6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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