{"id":"CVE-2026-99091","state":"PUBLISHED","title":"Bluetooth: MGMT: Fix status of pending commands flushed on power off","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix status of pending commands flushed on power off\n\ncmd_complete_rsp() receives a struct cmd_lookup and, for a pending\ncommand that has no cmd_complete callback, falls through to\ncmd_status_rsp(cmd, data). cmd_status_rsp() reads data as a u8 *, so\nthe status sent comes from the first byte of match->sk's\nrepresentation, not from match->mgmt_status.\n\ncommit f53e1c9c726d (\"Bluetooth: MGMT: Fix possible crash on\nmgmt_index_removed\") changed the callers' data from &status to &match\nand updated the cmd_complete branch to match->mgmt_status, but left\nthe fall-through passing data unchanged.\n\nIn mgmt_index_removed() match->sk is NULL, so every such command is\nanswered with status 0x00 (Success) instead of\nMGMT_STATUS_INVALID_INDEX. In __mgmt_power_off() it is NULL too,\nunless a Set Powered command was pending: then settings_rsp() has\nstored that command's socket in match->sk, and the byte sent comes\nfrom the socket pointer. Either way the status the caller set,\nMGMT_STATUS_NOT_POWERED (or MGMT_STATUS_INVALID_INDEX when the device\nis being unregistered), is lost.\n\nPass the status the callers set.\n\nThis was seen on a QCA9377 laptop: bluetoothd's Start Discovery,\npending when the adapter was powered off, was answered with Command\nStatus 0x00 and no parameters, and bluetoothd 5.72 crashed on the\nzero-length success. BlueZ master has since added the length check\non that path (\"adapter: Fix crash on short start discovery reply\",\nBlueZ a734b06059cb), but userspace should still be told Not Powered,\nnot Success.\n\nTested on Ubuntu 7.0.0-31 with a virtual controller (hci_vhci):\npower off is held in HCI Write Scan Enable while a Start Discovery is\nsubmitted, and the flush answers it with status 0x00 before this\nchange and 0x0f (Not Powered) after.","publishedAt":"2026-10-26T14:52:00.262Z","updatedAt":"2026-10-30T12:41:41.779Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"19b40ca62607cef78369549d1af091f2fd558931","status":"affected","lessThan":"bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08","versionType":"git"},{"version":"4883296505aa7e4863c6869b689afb6005633b23","status":"affected","lessThan":"44ce36c5789ac84e65de1e98c32db9a5ac04ed47","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"7ed7e038b520cf0dfa12d61c2caddb95e2f6922d","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"ec227cddd13cd7ac9077d263a73473ac370a055d","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"07976405a3c71253e50533ee7b7a8b0dc16ab6ba","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc","versionType":"git"},{"version":"0cc47233af35fb5f10b5e6a027cb4ccd480caf9a","status":"affected","versionType":"git"},{"version":"8c3f7943a29145d8a2d8e24893762f7673323eae","status":"affected","versionType":"git"},{"version":"6.1.120","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"6.6.55","status":"affected","lessThan":"6.6.160","versionType":"semver"},{"version":"6.10.14","status":"affected","lessThan":"6.11","versionType":"semver"},{"version":"6.11.3","status":"affected","lessThan":"6.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/mgmt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/mgmt.c"]}],"references":["https://git.kernel.org/stable/c/bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08","https://git.kernel.org/stable/c/44ce36c5789ac84e65de1e98c32db9a5ac04ed47","https://git.kernel.org/stable/c/7ed7e038b520cf0dfa12d61c2caddb95e2f6922d","https://git.kernel.org/stable/c/ec227cddd13cd7ac9077d263a73473ac370a055d","https://git.kernel.org/stable/c/07976405a3c71253e50533ee7b7a8b0dc16ab6ba","https://git.kernel.org/stable/c/86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc"],"weaknesses":[],"ingestedAt":"2026-10-30T13:02:04.640Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99091.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99091","state":"PUBLISHED","datePublished":"2026-10-26T14:52:00.262Z","dateUpdated":"2026-10-30T12:41:41.779Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.390Z"},"containers":{"cna":{"title":"Bluetooth: MGMT: Fix status of pending commands flushed on power off","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix status of pending commands flushed on power off\n\ncmd_complete_rsp() receives a struct cmd_lookup and, for a pending\ncommand that has no cmd_complete callback, falls through to\ncmd_status_rsp(cmd, data). cmd_status_rsp() reads data as a u8 *, so\nthe status sent comes from the first byte of match->sk's\nrepresentation, not from match->mgmt_status.\n\ncommit f53e1c9c726d (\"Bluetooth: MGMT: Fix possible crash on\nmgmt_index_removed\") changed the callers' data from &status to &match\nand updated the cmd_complete branch to match->mgmt_status, but left\nthe fall-through passing data unchanged.\n\nIn mgmt_index_removed() match->sk is NULL, so every such command is\nanswered with status 0x00 (Success) instead of\nMGMT_STATUS_INVALID_INDEX. In __mgmt_power_off() it is NULL too,\nunless a Set Powered command was pending: then settings_rsp() has\nstored that command's socket in match->sk, and the byte sent comes\nfrom the socket pointer. Either way the status the caller set,\nMGMT_STATUS_NOT_POWERED (or MGMT_STATUS_INVALID_INDEX when the device\nis being unregistered), is lost.\n\nPass the status the callers set.\n\nThis was seen on a QCA9377 laptop: bluetoothd's Start Discovery,\npending when the adapter was powered off, was answered with Command\nStatus 0x00 and no parameters, and bluetoothd 5.72 crashed on the\nzero-length success. BlueZ master has since added the length check\non that path (\"adapter: Fix crash on short start discovery reply\",\nBlueZ a734b06059cb), but userspace should still be told Not Powered,\nnot Success.\n\nTested on Ubuntu 7.0.0-31 with a virtual controller (hci_vhci):\npower off is held in HCI Write Scan Enable while a Start Discovery is\nsubmitted, and the flush answers it with status 0x00 before this\nchange and 0x0f (Not Powered) after."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"19b40ca62607cef78369549d1af091f2fd558931","status":"affected","lessThan":"bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08","versionType":"git"},{"version":"4883296505aa7e4863c6869b689afb6005633b23","status":"affected","lessThan":"44ce36c5789ac84e65de1e98c32db9a5ac04ed47","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"7ed7e038b520cf0dfa12d61c2caddb95e2f6922d","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"ec227cddd13cd7ac9077d263a73473ac370a055d","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"07976405a3c71253e50533ee7b7a8b0dc16ab6ba","versionType":"git"},{"version":"f53e1c9c726d83092167f2226f32bd3b73f26c21","status":"affected","lessThan":"86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc","versionType":"git"},{"version":"0cc47233af35fb5f10b5e6a027cb4ccd480caf9a","status":"affected","versionType":"git"},{"version":"8c3f7943a29145d8a2d8e24893762f7673323eae","status":"affected","versionType":"git"},{"version":"6.1.120","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"6.6.55","status":"affected","lessThan":"6.6.160","versionType":"semver"},{"version":"6.10.14","status":"affected","lessThan":"6.11","versionType":"semver"},{"version":"6.11.3","status":"affected","lessThan":"6.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/mgmt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/mgmt.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08"},{"url":"https://git.kernel.org/stable/c/44ce36c5789ac84e65de1e98c32db9a5ac04ed47"},{"url":"https://git.kernel.org/stable/c/7ed7e038b520cf0dfa12d61c2caddb95e2f6922d"},{"url":"https://git.kernel.org/stable/c/ec227cddd13cd7ac9077d263a73473ac370a055d"},{"url":"https://git.kernel.org/stable/c/07976405a3c71253e50533ee7b7a8b0dc16ab6ba"},{"url":"https://git.kernel.org/stable/c/86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:41:41.779Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.120","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.55","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}