CVE-2026-99014

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99014", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.385Z", "datePublished": "2026-10-23T12:20:39.617Z", "dateUpdated": "2026-10-24T14:10:02.640Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:10:02.640Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix command skb lifetime during scan setup\n\nDuring PA sync scan setup, hci_le_set_ext_scan_param_sync() gets the\naddress used for the PA_LINK lookup from hci_sent_cmd_data(). The\nreturned pointer borrows storage from sent_cmd or req_skb, without\nholding a reference to either skb.\n\nThe scan worker runs on req_workqueue while hci_cmd_work() runs on the\nseparate device workqueue. After the scan worker loads sent_cmd, the\ncommand worker can free and replace it before hci_sent_cmd_data()\ndereferences the skb. The command payload can also be freed between\nreturning from the helper and comparing the address. The connection\nlookup's RCU critical section does not protect the command skb.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in hci_sent_cmd_data+0x27c/0x2f0\n Workqueue: hci0 hci_cmd_sync_work\n Call Trace:\n hci_sent_cmd_data+0x27c/0x2f0\n hci_le_set_scan_param_sync+0x43a/0x850\n hci_passive_scan_sync+0xb09/0x1460\n hci_update_passive_scan_sync+0x47c/0x6e0\n hci_le_pa_create_sync+0x200/0xa70\n hci_cmd_sync_work+0x13c/0x290\n\n Allocated by task 95:\n skb_clone+0x13f/0x340\n hci_cmd_work+0x2a9/0x7e0\n\n Freed by task 95:\n kmem_cache_free+0xba/0x3a0\n hci_cmd_work+0x29c/0x7e0\n\nUse hdev->lock to serialize the address snapshot with sent_cmd\nreplacement. Protect req_skb replacement and completion cleanup with\nthe same lock because the helper falls back to that skb. Copy the\naddress before releasing the lock and use the copy for the existing\nRCU-protected connection lookup. Release the mutex before sending or\nwaiting for commands, preserving the lookup and completion ordering."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - A local listen(2) on a broadcast BTPROTO_ISO socket reaches iso_sock_listen() \u2192 iso_listen_bis() \u2192 hci_pa_create_sync() \u2192 hci_le_pa_create_sync() \u2192 hci_le_set_ext_scan_param_sync(). No received Bluetooth PDU initiates this PA-sync setup.\nAC:L - The attacker can run the ISO listen while flooding security-filter-permitted HCI_OP_READ_LOCAL_VERSION commands through a raw HCI socket; hci_sock_sendmsg() queues them on hdev->cmd_q, making hci_cmd_work() race hci_sent_cmd_data() on the separate req_workqueue.\nPR:L - iso_sock_create(), bind(), and listen() have no capability check, while an unprivileged raw HCI socket may submit HCI_OP_READ_LOCAL_VERSION because OGF_INFO_PARAM/OCF 1 is in hci_sec_filter. Bluetooth sockets require init_net, but an ordinary host user satisfies that condition.\nUI:N - The attacking process itself binds and listens on the broadcast ISO socket and submits the racing raw HCI commands; no separate victim action is needed once ISO sockets and the adapter are enabled.\nS:U - The stale sent_cmd or req_skb and resulting memory access remain within the host kernel's Bluetooth authority; hci_le_set_ext_scan_param_sync() crosses no VM, IOMMU, or other security boundary.\nC:H - hci_cmd_data() dereferences len and data from a freed sk_buff, and the returned command-payload pointer can itself be freed before the six-byte bdaddr read. Reclaiming the sprayable skbuff_head_cache object therefore supplies an attacker-directed stale-pointer read primitive.\nI:H - A reclaimed command sk_buff controls the stale len/data fields and the bdaddr used to select a PA_LINK, whose iso_qos then determines the HCI_OP_LE_SET_EXT_SCAN_PARAMS command. This sprayable kernel use-after-free is an integrity-high memory-corruption primitive.\nA:H - KASAN confirmed a slab-use-after-free in hci_sent_cmd_data(); dereferencing the freed sk_buff or its released payload can fault in hci_cmd_sync_work and cause a kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_core.c", "net/bluetooth/hci_sync.c"], "versions": [{"version": "de3c85d321bfb85b7742a6cfab95d680da3e26b1", "lessThan": "f01cbddfb4273fcc9a786d13b0a2525029023605", "status": "affected", "versionType": "git"}, {"version": "22cbf4f84c00da64196eb15034feee868e63eef0", "lessThan": "119ba8070b3f112dd36c897f4f70ea5bb7d370b8", "status": "affected", "versionType": "git"}, {"version": "22cbf4f84c00da64196eb15034feee868e63eef0", "lessThan": "7db33b36213a3a1a40940c009ddac30670b55922", "status": "affected", "versionType": "git"}, {"version": "22cbf4f84c00da64196eb15034feee868e63eef0", "lessThan": "762850c203fab1190ad6a3de41cd51920b22236d", "status": "affected", "versionType": "git"}, {"version": "22cbf4f84c00da64196eb15034feee868e63eef0", "lessThan": "9af12272061d206af8bc3e40215cb694421ab73a", "status": "affected", "versionType": "git"}, {"version": "7a54f8314584f78fb0557153b1059924249ef628", "status": "affected", "versionType": "git"}, {"version": "6.6.28", "lessThan": "6.6.160", "status": "affected", "versionType": "semver"}, {"version": "6.8.7", "lessThan": "6.9", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_core.c", "net/bluetooth/hci_sync.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.28", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605"}, {"url": "https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8"}, {"url": "https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922"}, {"url": "https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d"}, {"url": "https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a"}], "title": "Bluetooth: hci_sync: Fix command skb lifetime during scan setup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/hci_core.c", "net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f01cbddfb4273fcc9a786d13b0a2525029023605", "status": "affected", "version": "de3c85d321bfb85b7742a6cfab95d680da3e26b1", "versionType": "git"}, {"lessThan": "119ba8070b3f112dd36c897f4f70ea5bb7d370b8", "status": "affected", "version": "22cbf4f84c00da64196eb15034feee868e63eef0", "versionType": "git"}, {"lessThan": "7db33b36213a3a1a40940c009ddac30670b55922", "status": "affected", "version": "22cbf4f84c00da64196eb15034feee868e63eef0", "versionType": "git"}, {"lessThan": "762850c203fab1190ad6a3de41cd51920b22236d", "status": "affected", "version": "22cbf4f84c00da64196eb15034feee868e63eef0", "versionType": "git"}, {"lessThan": "9af12272061d206af8bc3e40215cb694421ab73a", "status": "affected", "version": "22cbf4f84c00da64196eb15034feee868e63eef0", "versionType": "git"}, {"status": "affected", "version": "7a54f8314584f78fb0557153b1059924249ef628", "versionType": "git"}, {"lessThan": "6.6.160", "status": "affected", "version": "6.6.28", "versionType": "semver"}, {"lessThan": "6.9", "status": "affected", "version": "6.8.7", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/hci_core.c", "net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix command skb lifetime during scan setup\n\nDuring PA sync scan setup, hci_le_set_ext_scan_param_sync() gets the\naddress used for the PA_LINK lookup from hci_sent_cmd_data(). The\nreturned pointer borrows storage from sent_cmd or req_skb, without\nholding a reference to either skb.\n\nThe scan worker runs on req_workqueue while hci_cmd_work() runs on the\nseparate device workqueue. After the scan worker loads sent_cmd, the\ncommand worker can free and replace it before hci_sent_cmd_data()\ndereferences the skb. The command payload can also be freed between\nreturning from the helper and comparing the address. The connection\nlookup's RCU critical section does not protect the command skb.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in hci_sent_cmd_data+0x27c/0x2f0\n Workqueue: hci0 hci_cmd_sync_work\n Call Trace:\n hci_sent_cmd_data+0x27c/0x2f0\n hci_le_set_scan_param_sync+0x43a/0x850\n hci_passive_scan_sync+0xb09/0x1460\n hci_update_passive_scan_sync+0x47c/0x6e0\n hci_le_pa_create_sync+0x200/0xa70\n hci_cmd_sync_work+0x13c/0x290\n\n Allocated by task 95:\n skb_clone+0x13f/0x340\n hci_cmd_work+0x2a9/0x7e0\n\n Freed by task 95:\n kmem_cache_free+0xba/0x3a0\n hci_cmd_work+0x29c/0x7e0\n\nUse hdev->lock to serialize the address snapshot with sent_cmd\nreplacement. Protect req_skb replacement and completion cleanup with\nthe same lock because the helper falls back to that skb. Copy the\naddress before releasing the lock and use the copy for the existing\nRCU-protected connection lookup. Release the mutex before sending or\nwaiting for commands, preserving the lookup and completion ordering."}], "id": "CVE-2026-99014", "lastModified": "2026-10-24T14:16:52.500", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-23T13:17:24.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Bluetooth: hci_sync: Fix command skb lifetime during scan setup", "id": "2559733", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559733"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: hci_sync: Fix command skb lifetime during scan setup\nDuring PA sync scan setup, hci_le_set_ext_scan_param_sync() gets the\naddress used for the PA_LINK lookup from hci_sent_cmd_data(). The\nreturned pointer borrows storage from sent_cmd or req_skb, without\nholding a reference to either skb.\nThe scan worker runs on req_workqueue while hci_cmd_work() runs on the\nseparate device workqueue. After the scan worker loads sent_cmd, the\ncommand worker can free and replace it before hci_sent_cmd_data()\ndereferences the skb. The command payload can also be freed between\nreturning from the helper and comparing the address. The connection\nlookup's RCU critical section does not protect the command skb.\nKASAN reported:\nBUG: KASAN: slab-use-after-free in hci_sent_cmd_data+0x27c/0x2f0\nWorkqueue: hci0 hci_cmd_sync_work\nCall Trace:\nhci_sent_cmd_data+0x27c/0x2f0\nhci_le_set_scan_param_sync+0x43a/0x850\nhci_passive_scan_sync+0xb09/0x1460\nhci_update_passive_scan_sync+0x47c/0x6e0\nhci_le_pa_create_sync+0x200/0xa70\nhci_cmd_sync_work+0x13c/0x290\nAllocated by task 95:\nskb_clone+0x13f/0x340\nhci_cmd_work+0x2a9/0x7e0\nFreed by task 95:\nkmem_cache_free+0xba/0x3a0\nhci_cmd_work+0x29c/0x7e0\nUse hdev->lock to serialize the address snapshot with sent_cmd\nreplacement. Protect req_skb replacement and completion cleanup with\nthe same lock because the helper falls back to that skb. Copy the\naddress before releasing the lock and use the copy for the existing\nRCU-protected connection lookup. Release the mutex before sending or\nwaiting for commands, preserving the lookup and completion ordering.", "A flaw was found in the Linux kernel's Bluetooth subsystem. A race condition between concurrent worker threads during Periodic Advertising (PA) sync scan setup can cause a command buffer to be freed while still in use. A local attacker could exploit this use-after-free flaw to cause a Denial of Service (DoS) by crashing the system or potentially escalate privileges."], "name": "CVE-2026-99014", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99014\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99014\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99014.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[de3c85d321bfb85b7742a6cfab95d680da3e26b1,f01cbddfb4273fcc9a786d13b0a2525029023605)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22cbf4f84c00da64196eb15034feee868e63eef0,119ba8070b3f112dd36c897f4f70ea5bb7d370b8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22cbf4f84c00da64196eb15034feee868e63eef0,7db33b36213a3a1a40940c009ddac30670b55922)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22cbf4f84c00da64196eb15034feee868e63eef0,762850c203fab1190ad6a3de41cd51920b22236d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22cbf4f84c00da64196eb15034feee868e63eef0,9af12272061d206af8bc3e40215cb694421ab73a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "7a54f8314584f78fb0557153b1059924249ef628"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.28,6.6.160)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.8.7,6.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.114,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", 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"linux"}], "created": "2026-10-23T15:30:14.846837+00:00", "updated": "2026-10-29T21:00:21.909294+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}