{"id":"CVE-2026-98297","state":"PUBLISHED","title":"Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: Fix queuing tx_work after workqueue is drained\n\nhci_send_acl(), hci_send_sco() and hci_send_iso() queue hdev->tx_work\nunconditionally. They can run from the L2CAP/SCO/ISO socket send path\nwhile hci_dev_close_sync() is draining hdev->workqueue (HCIDEVDOWN\nracing with a socket write). Since that queue_work() is not chained\nwork from the tx_work worker itself, __queue_work() sees the queue\nmarked __WQ_DRAINING, warns \"cannot queue %ps on wq %s\", and drops\nthe work:\n\n  WARNING: CPU: 1 PID: 5985 at kernel/workqueue.c:2352 __queue_work\n  Call Trace:\n   queue_work_on\n   l2cap_chan_send\n   l2cap_sock_sendmsg\n   ...\n\nhci_dev_close_sync() already sets HCI_CMD_DRAIN_WORKQUEUE before\ndraining, but only hci_cmd_work() and handle_cmd_cnt_and_timer()\ncheck it before queuing. Route the tx_work producers through the\nsame guard via a shared hci_sched_tx() helper.","publishedAt":"2026-10-06T08:45:55.723Z","updatedAt":"2026-10-30T12:38:01.528Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ccf07dfb9d7d1e2c7a1eeb782f90d9b614ebba9c","status":"affected","lessThan":"9943b4c70ad972f368705da8605054f865b08dad","versionType":"git"},{"version":"7b81c1378b79c3143ca3fdb3d18ac0f01cbabb21","status":"affected","lessThan":"8010212197d4a3ee714f78ed77048d0b712ff925","versionType":"git"},{"version":"9cebe4680bb9a72f80c6541eb24af06db7a1fbc9","status":"affected","lessThan":"ab0678a0701ac4de499428dc1b321659bb74d272","versionType":"git"},{"version":"47330cc875b36a1cf7b3543cb2cf90a7c603ce0e","status":"affected","lessThan":"e220c1242a643d97102a79f09b7ef3aa31276961","versionType":"git"},{"version":"525daaea459fc215f432de1b8debbd9144bf97b0","status":"affected","lessThan":"cbb325bc150e8c0dbce004ac0e5516bcffc0de31","versionType":"git"},{"version":"525daaea459fc215f432de1b8debbd9144bf97b0","status":"affected","lessThan":"6610c6fe4b8936c232048e6049bf77c70a6f759c","versionType":"git"},{"version":"60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff","status":"affected","versionType":"git"},{"version":"6.12.93","status":"affected","lessThan":"6.12.112","versionType":"semver"},{"version":"6.18.35","status":"affected","lessThan":"6.18.54","versionType":"semver"},{"version":"7.0.12","status":"affected","lessThan":"7.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","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/hci_core.c"]}],"references":["https://git.kernel.org/stable/c/9943b4c70ad972f368705da8605054f865b08dad","https://git.kernel.org/stable/c/8010212197d4a3ee714f78ed77048d0b712ff925","https://git.kernel.org/stable/c/ab0678a0701ac4de499428dc1b321659bb74d272","https://git.kernel.org/stable/c/e220c1242a643d97102a79f09b7ef3aa31276961","https://git.kernel.org/stable/c/cbb325bc150e8c0dbce004ac0e5516bcffc0de31","https://git.kernel.org/stable/c/6610c6fe4b8936c232048e6049bf77c70a6f759c"],"weaknesses":[],"ingestedAt":"2026-10-30T12:56:04.490Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98297.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98297","state":"PUBLISHED","datePublished":"2026-10-06T08:45:55.723Z","dateUpdated":"2026-10-30T12:38:01.528Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.337Z"},"containers":{"cna":{"title":"Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: Fix queuing tx_work after workqueue is drained\n\nhci_send_acl(), hci_send_sco() and hci_send_iso() queue hdev->tx_work\nunconditionally. They can run from the L2CAP/SCO/ISO socket send path\nwhile hci_dev_close_sync() is draining hdev->workqueue (HCIDEVDOWN\nracing with a socket write). Since that queue_work() is not chained\nwork from the tx_work worker itself, __queue_work() sees the queue\nmarked __WQ_DRAINING, warns \"cannot queue %ps on wq %s\", and drops\nthe work:\n\n  WARNING: CPU: 1 PID: 5985 at kernel/workqueue.c:2352 __queue_work\n  Call Trace:\n   queue_work_on\n   l2cap_chan_send\n   l2cap_sock_sendmsg\n   ...\n\nhci_dev_close_sync() already sets HCI_CMD_DRAIN_WORKQUEUE before\ndraining, but only hci_cmd_work() and handle_cmd_cnt_and_timer()\ncheck it before queuing. Route the tx_work producers through the\nsame guard via a shared hci_sched_tx() helper."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ccf07dfb9d7d1e2c7a1eeb782f90d9b614ebba9c","status":"affected","lessThan":"9943b4c70ad972f368705da8605054f865b08dad","versionType":"git"},{"version":"7b81c1378b79c3143ca3fdb3d18ac0f01cbabb21","status":"affected","lessThan":"8010212197d4a3ee714f78ed77048d0b712ff925","versionType":"git"},{"version":"9cebe4680bb9a72f80c6541eb24af06db7a1fbc9","status":"affected","lessThan":"ab0678a0701ac4de499428dc1b321659bb74d272","versionType":"git"},{"version":"47330cc875b36a1cf7b3543cb2cf90a7c603ce0e","status":"affected","lessThan":"e220c1242a643d97102a79f09b7ef3aa31276961","versionType":"git"},{"version":"525daaea459fc215f432de1b8debbd9144bf97b0","status":"affected","lessThan":"cbb325bc150e8c0dbce004ac0e5516bcffc0de31","versionType":"git"},{"version":"525daaea459fc215f432de1b8debbd9144bf97b0","status":"affected","lessThan":"6610c6fe4b8936c232048e6049bf77c70a6f759c","versionType":"git"},{"version":"60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff","status":"affected","versionType":"git"},{"version":"6.12.93","status":"affected","lessThan":"6.12.112","versionType":"semver"},{"version":"6.18.35","status":"affected","lessThan":"6.18.54","versionType":"semver"},{"version":"7.0.12","status":"affected","lessThan":"7.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","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/hci_core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9943b4c70ad972f368705da8605054f865b08dad"},{"url":"https://git.kernel.org/stable/c/8010212197d4a3ee714f78ed77048d0b712ff925"},{"url":"https://git.kernel.org/stable/c/ab0678a0701ac4de499428dc1b321659bb74d272"},{"url":"https://git.kernel.org/stable/c/e220c1242a643d97102a79f09b7ef3aa31276961"},{"url":"https://git.kernel.org/stable/c/cbb325bc150e8c0dbce004ac0e5516bcffc0de31"},{"url":"https://git.kernel.org/stable/c/6610c6fe4b8936c232048e6049bf77c70a6f759c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:38:01.528Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.93","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.35","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.12"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}