{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-93247", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-93247", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-24T15:51:04.897Z", "updatedAt": "2026-10-19T09:08:00.296Z", "importedAt": "2026-10-24T01:58:35.090Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Bluetooth: mgmt: fix 'hdev->discovery.uuids' NULL dereference", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix 'hdev->discovery.uuids' NULL dereference\n\n'uuid_count' member of struct 'discovery_state' is assigned and read\nwithout any locks, so there is a chance of situation when\nuuid_count != 0, but uuids is NULL and there will be NULL pointer\ndereference.\n\nPossible race:\n'hci_update_passive_scan_sync'\n 'hci_discovery_filter_clear'\n hdev->discovery.uuid_count = 0;\n <----------------------preempted----------------------------->\n 'start_service_discovery'\n // Set uuid_count to value != 0\n hdev->discovery.uuid_count = uuid_count;\n hdev->discovery.uuids = kmemdup(...);\n <----------------------preempted----------------------------->\n spin_lock(&hdev->discovery.lock);\n kfree(hdev->discovery.uuids);\n hdev->discovery.uuids = NULL;\n spin_unlock(&hdev->discovery.lock);\n\nNow uuids == NULL and uuid_count != 0.\nSo 'mgmt_device_found' -> 'is_filter_match' -> 'eir_has_uuids' receives\nnon consistent discovery state, where NULL dereference of uuids happens.\n\nTo fix it let's add discovery.lock around every read/write of uuid_count,\nuuids pair of struct members. It is also important to assign uuid_count\nvalue only after success kmemdup() allocation in\nstart_service_discovery(), otherwise uuids is NULL, because kmemdup failed,\nbut uuid_count is already assigned to non zero value.\n\nThe following panic happens:\n\n[ ] ------------[ cut here ]------------\n[ ] Unable to handle kernel NULL pointer dereference at virtual\naddress 0000000000000000\n[ ] Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP\n[ ] CPU: 0 PID: 15056 Comm: kworker/u9:2\n[ ] Workqueue: hci0 hci_rx_work\n[ ] pstate: 10400009 (nzcV daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ ] pc : eir_has_uuids+0x2d8/0x590\n[ ] lr : is_filter_match+0x258/0x320\n...\n[ ] Call trace:\n[ ] eir_has_uuids+0x2d8/0x590\n[ ] is_filter_match+0x258/0x320\n[ ] mgmt_device_found+0x5b0/0xafc\n[ ] process_adv_report.part.0+0x8c8/0xf14\n[ ] hci_le_adv_report_evt+0x338/0x3f0\n[ ] hci_le_meta_evt+0x1f0/0x4c8\n[ ] hci_event_packet+0x440/0xc9c\n[ ] hci_rx_work+0x44c/0xaf8\n[ ] process_one_work+0x54c/0x103c\n[ ] worker_thread+0x6c4/0x10c4\n[ ] kthread+0x274/0x2ec\n[ ] ret_from_fork+0x10/0x20\n[ ] Code: 14000004 91004021 eb14003f 54000180 (f9400024)\n[ ] ---[ end trace 0000000000000000 ]---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "86f3dcd1f331cfd4fd7ec88906955134ec51afbe", "status": "affected", "versionType": "git", "lessThan": "f02c01ccd12cb2b8a290077d4c90f29a6e109b16" }, { "version": "7ce9bb0b95fc280e9212b8922590c492ca1d9c39", "status": "affected", "versionType": "git", "lessThan": "bbd262d2d750b67b15a5e1008d3848309c87e7a7" }, { "version": "16852eccbdfaf41a666705e3f8be55cf2864c5ca", "status": "affected", "versionType": "git", "lessThan": "18fda026a13c5abd6c1e0dfd3549f490b73378fb" }, { "version": "2935e556850e9c94d7a00adf14d3cd7fe406ac03", "status": "affected", "versionType": "git", "lessThan": "c3f63610bceaa182e4683b23cc47baf36b5f1496" }, { "version": "2935e556850e9c94d7a00adf14d3cd7fe406ac03", "status": "affected", "versionType": "git", "lessThan": "ee2135a14fb2a3e176149122764d293f0796b1eb" }, { "version": "2935e556850e9c94d7a00adf14d3cd7fe406ac03", "status": "affected", "versionType": "git", "lessThan": "59eecbe2f2f38d8f3e1104bd11da97f9a2c58998" }, { "version": "a351ff6b8ecca4229afaa0d98042bead8de64799", "status": "affected", "versionType": "git" }, { "version": "f8069f34c4c976786ded97498012225af87435d7", "status": "affected", "versionType": "git" }, { "version": "6.1.159", "status": "affected", "versionType": "semver", "lessThan": "6.1.188" }, { "version": "6.6.117", "status": "affected", "versionType": "semver", "lessThan": "6.6.157" }, { "version": "6.12.42", "status": "affected", "versionType": "semver", "lessThan": "6.12.110" }, { "version": "6.15.10", "status": "affected", "versionType": "semver", "lessThan": "6.16" }, { "version": "6.16.1", "status": "affected", "versionType": "semver", "lessThan": "6.17" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.17", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.17" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.52", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }