{"api_version":"1","generated_at":"2026-10-15T23:43:49+00:00","cve":"CVE-2023-54210","urls":{"html":"https://cve.report/CVE-2023-54210","api":"https://cve.report/api/cve/CVE-2023-54210.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-54210","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-54210"},"summary":{"title":"Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()\n\nKASAN reports that there's a use-after-free in\nhci_remove_adv_monitor(). Trawling through the disassembly, you can\nsee that the complaint is from the access in bt_dev_dbg() under the\nHCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because\nmsft_remove_monitor() can end up freeing the monitor\nstructure. Specifically:\n  hci_remove_adv_monitor() ->\n  msft_remove_monitor() ->\n  msft_remove_monitor_sync() ->\n  msft_le_cancel_monitor_advertisement_cb() ->\n  hci_free_adv_monitor()\n\nLet's fix the problem by just stashing the relevant data when it's\nstill valid.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-12-30 13:16:09","updated_at":"2026-10-15 22:17:55"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b","name":"https://git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1","name":"https://git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea","name":"https://git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-54210","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54210","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c 0d4d6b083da9b033ddccef72d77f373c819ae3ea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c bf00c2c8f6254f44ac041aa9a311ae9e0caf692b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c de6dfcefd107667ce2dbedf4d9337f5ed557a4a1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.42 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4.7 6.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2023","cve_id":"54210","cve":"CVE-2023-54210","epss":"0.001280000","percentile":"0.028780000","score_date":"2026-08-06","updated_at":"2026-08-07 00:14:20"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2023-54210","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA 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Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/hci_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0d4d6b083da9b033ddccef72d77f373c819ae3ea","status":"affected","version":"7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c","versionType":"git"},{"lessThan":"bf00c2c8f6254f44ac041aa9a311ae9e0caf692b","status":"affected","version":"7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c","versionType":"git"},{"lessThan":"de6dfcefd107667ce2dbedf4d9337f5ed557a4a1","status":"affected","version":"7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/hci_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.0"},{"lessThan":"6.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.42","versionType":"semver"},{"lessThanOrEqual":"6.4.*","status":"unaffected","version":"6.4.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.42","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.4.7","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.5","versionStartIncluding":"6.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()\n\nKASAN reports that there's a use-after-free in\nhci_remove_adv_monitor(). Trawling through the disassembly, you can\nsee that the complaint is from the access in bt_dev_dbg() under the\nHCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because\nmsft_remove_monitor() can end up freeing the monitor\nstructure. Specifically:\n  hci_remove_adv_monitor() ->\n  msft_remove_monitor() ->\n  msft_remove_monitor_sync() ->\n  msft_le_cancel_monitor_advertisement_cb() ->\n  hci_free_adv_monitor()\n\nLet's fix the problem by just stashing the relevant data when it's\nstill valid."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable code is reached only through a local `AF_BLUETOOTH` HCI control socket carrying `MGMT_OP_REMOVE_ADV_MONITOR` (or via bluetoothd acting on a local D-Bus client); no Bluetooth peer, radio frame, or network packet participates in triggering the free-then-read.\nAC:L - The attacker deterministically drives the sequence by adding an advertisement monitor and then removing it — no race must be won, and on MSFT-capable controllers (Intel/Realtek/Qualcomm/MediaTek, i.e. most real hardware) the offending branch is the default path.\nPR:L - The mgmt handler nominally requires a trusted socket, but on stock Linux/ChromeOS systems an unprivileged local user drives the exact same add/remove monitor sequence through BlueZ's AdvertisementMonitorManager1 D-Bus interface, and monitors are auto-removed when the unprivileged client disconnects.\nUI:N - The attacking process performs the register/unregister sequence itself; no victim action, mount, or file open is needed.\nS:U - The freed object, the stale read, and the resulting impact all live in the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free read of a freed slab object whose contents can be groomed during the sleeping `msft_remove_addr_filters_sync()` window, and the recycled heap contents are emitted into the kernel log — a repeatable heap-disclosure primitive usable against KASLR.\nI:H - Use-after-free of a `struct adv_monitor` with an attacker-influenceable reallocation window is a memory-corruption class defect; the dangling reference to a reclaimed slab object is the standard building block for heap-spray driven corruption.\nA:H - Dereferencing the freed monitor oopses the kernel when the backing slab page has been returned to the page allocator or under KASAN/panic_on_warn, and the sequence can be repeated at will to crash the system."}]}],"providerMetadata":{"dateUpdated":"2026-08-05T09:18:04.882Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea"},{"url":"https://git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b"},{"url":"https://git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1"}],"title":"Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2023-54210","datePublished":"2025-12-30T12:11:08.682Z","dateReserved":"2025-12-30T12:06:44.500Z","dateUpdated":"2026-10-15T21:41:41.692Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-30 13:16:09","lastModifiedDate":"2026-10-15 22:17:55","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-15T21:39:22.862450Z","id":"CVE-2023-54210","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2023","CveId":"54210","Ordinal":"1","Title":"Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_","CVE":"CVE-2023-54210","Year":"2023"},"notes":[{"CveYear":"2023","CveId":"54210","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()\n\nKASAN reports that there's a use-after-free in\nhci_remove_adv_monitor(). Trawling through the disassembly, you can\nsee that the complaint is from the access in bt_dev_dbg() under the\nHCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because\nmsft_remove_monitor() can end up freeing the monitor\nstructure. Specifically:\n  hci_remove_adv_monitor() ->\n  msft_remove_monitor() ->\n  msft_remove_monitor_sync() ->\n  msft_le_cancel_monitor_advertisement_cb() ->\n  hci_free_adv_monitor()\n\nLet's fix the problem by just stashing the relevant data when it's\nstill valid.","Type":"Description","Title":"Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_"}]}}}