CVE-2024-36012

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The vulnerable `msft_do_close()` path is only reachable through local device-lifecycle operations.\nAC:L - The attacker controls both sides of the race \u2014 it creates the HCI device, arms the close path (the 2-second `power_off` auto-off delayed work, or an injected HCI Hardware Error that queues `error_reset`), then tears the transport down to run `msft_unregister()` concurrently. The window is wide (no shared lock between the free and the use) and the attempt is infinitely retryable.\nPR:L - An unprivileged local user reaching the Bluetooth HCI device-management interfaces can drive both the adapter power-down path and the transport teardown that frees `msft_data`; no real root in the initial namespace is required to win this race. This matches the privilege level assigned to the equivalent HCI teardown use-after-frees (CVE-2024-53208, CVE-2024-58013, CVE-2024-58241).\nUI:N - The race is driven entirely by the attacker's own sequence of device-lifecycle and power-state operations. No victim action or interaction is needed at any point.\nS:U - The freed object, the corrupted heap, and the resulting compromise all reside within the kernel's own security authority. There is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - After the freed `msft_data` slab is reallocated with sprayed data, `msft_do_close()` walks `msft->handle_map` and reads `handle_data->mgmt_handle` from attacker-controlled memory and feeds it to `idr_find()`, yielding an arbitrary kernel read primitive. Any use-after-free of this shape enables disclosure of arbitrary kernel memory.\nI:H - The same list walks perform `list_del()` on attacker-controlled `list_head` pointers \u2014 an arbitrary write of pointer values to attacker-chosen kernel addresses \u2014 followed by `kfree()` of an attacker-chosen pointer, and `mutex_lock()` on a corrupted `filter_lock`. These are classic primitives for control-flow hijacking and local privilege escalation.\nA:H - Even without successful exploitation, the slab-use-after-free reliably corrupts kernel state and causes an oops or panic, as demonstrated by the KASAN report in `__mutex_lock` from `kworker/u5:2`. This is a complete denial of service that the attacker can trigger at will."}]}], "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/msft.c", "net/bluetooth/msft.h"], "versions": [{"version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "e3880b531b68f98d3941d83f2f6dd11cf4fd6b76", "status": "affected", "versionType": "git"}, {"version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "a85a60e62355e3bf4802dead7938966824b23940", "status": "affected", "versionType": "git"}, {"version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "4f1de02de07748da80a8178879bc7a1df37fdf56", "status": "affected", "versionType": "git"}, {"version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "10f9f426ac6e752c8d87bf4346930ba347aaabac", "status": "affected", "versionType": "git"}]}, {"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/msft.c", "net/bluetooth/msft.h"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.91", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.31", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.10", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "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": "5.12", "versionEndExcluding": "6.1.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.6.31"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.8.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e3880b531b68f98d3941d83f2f6dd11cf4fd6b76"}, {"url": "https://git.kernel.org/stable/c/a85a60e62355e3bf4802dead7938966824b23940"}, {"url": "https://git.kernel.org/stable/c/4f1de02de07748da80a8178879bc7a1df37fdf56"}, {"url": "https://git.kernel.org/stable/c/10f9f426ac6e752c8d87bf4346930ba347aaabac"}], "title": "Bluetooth: msft: fix slab-use-after-free in msft_do_close()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-10T18:54:16.912662Z", "id": "CVE-2024-36012", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-10T18:54:24.668Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:30:12.508Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/e3880b531b68f98d3941d83f2f6dd11cf4fd6b76", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a85a60e62355e3bf4802dead7938966824b23940", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4f1de02de07748da80a8178879bc7a1df37fdf56", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/10f9f426ac6e752c8d87bf4346930ba347aaabac", "tags": ["x_transferred"]}]}]}}

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The vulnerable `msft_do_close()` path is only reachable through local device-lifecycle operations.\nAC:L - The attacker controls both sides of the race \u2014 it creates the HCI device, arms the close path (the 2-second `power_off` auto-off delayed work, or an injected HCI Hardware Error that queues `error_reset`), then tears the transport down to run `msft_unregister()` concurrently. The window is wide (no shared lock between the free and the use) and the attempt is infinitely retryable.\nPR:L - An unprivileged local user reaching the Bluetooth HCI device-management interfaces can drive both the adapter power-down path and the transport teardown that frees `msft_data`; no real root in the initial namespace is required to win this race. This matches the privilege level assigned to the equivalent HCI teardown use-after-frees (CVE-2024-53208, CVE-2024-58013, CVE-2024-58241).\nUI:N - The race is driven entirely by the attacker's own sequence of device-lifecycle and power-state operations. No victim action or interaction is needed at any point.\nS:U - The freed object, the corrupted heap, and the resulting compromise all reside within the kernel's own security authority. There is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - After the freed `msft_data` slab is reallocated with sprayed data, `msft_do_close()` walks `msft->handle_map` and reads `handle_data->mgmt_handle` from attacker-controlled memory and feeds it to `idr_find()`, yielding an arbitrary kernel read primitive. Any use-after-free of this shape enables disclosure of arbitrary kernel memory.\nI:H - The same list walks perform `list_del()` on attacker-controlled `list_head` pointers \u2014 an arbitrary write of pointer values to attacker-chosen kernel addresses \u2014 followed by `kfree()` of an attacker-chosen pointer, and `mutex_lock()` on a corrupted `filter_lock`. These are classic primitives for control-flow hijacking and local privilege escalation.\nA:H - Even without successful exploitation, the slab-use-after-free reliably corrupts kernel state and causes an oops or panic, as demonstrated by the KASAN report in `__mutex_lock` from `kworker/u5:2`. This is a complete denial of service that the attacker can trigger at will."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "e3880b531b68f98d3941d83f2f6dd11cf4fd6b76", "versionType": "git"}, {"status": "affected", "version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "a85a60e62355e3bf4802dead7938966824b23940", "versionType": "git"}, {"status": "affected", "version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "4f1de02de07748da80a8178879bc7a1df37fdf56", "versionType": "git"}, {"status": "affected", "version": "bf6a4e30ffbd9e9ef8934582feb937f6532f8b68", "lessThan": "10f9f426ac6e752c8d87bf4346930ba347aaabac", "versionType": "git"}], "programFiles": ["net/bluetooth/hci_core.c", "net/bluetooth/msft.c", "net/bluetooth/msft.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"status": "unaffected", "version": "0", "lessThan": "5.12", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.91", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.31", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.8.10", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/bluetooth/hci_core.c", "net/bluetooth/msft.c", "net/bluetooth/msft.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/e3880b531b68f98d3941d83f2f6dd11cf4fd6b76"}, {"url": "https://git.kernel.org/stable/c/a85a60e62355e3bf4802dead7938966824b23940"}, {"url": "https://git.kernel.org/stable/c/4f1de02de07748da80a8178879bc7a1df37fdf56"}, {"url": "https://git.kernel.org/stable/c/10f9f426ac6e752c8d87bf4346930ba347aaabac"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: msft: fix slab-use-after-free in msft_do_close()\n\nTying the msft->data lifetime to hdev by freeing it in\nhci_release_dev() to fix the following case:\n\n[use]\nmsft_do_close()\n msft = hdev->msft_data;\n if (!msft) ...(1) <- passed.\n return;\n mutex_lock(&msft->filter_lock); ...(4) <- used after freed.\n\n[free]\nmsft_unregister()\n msft = hdev->msft_data;\n hdev->msft_data = NULL; ...(2)\n kfree(msft); ...(3) <- msft is freed.\n\n==================================================================\nBUG: KASAN: slab-use-after-free in __mutex_lock_common\nkernel/locking/mutex.c:587 [inline]\nBUG: KASAN: slab-use-after-free in __mutex_lock+0x8f/0xc30\nkernel/locking/mutex.c:752\nRead of size 8 at addr ffff888106cbbca8 by task kworker/u5:2/309"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.91", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.31", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8.10", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9", "versionStartIncluding": "5.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:31:34.945Z"}}}, "cveMetadata": {"cveId": "CVE-2024-36012", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:31:34.945Z", "dateReserved": "2024-05-17T13:50:33.153Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-23T07:03:06.904Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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[gratis] msft_unregister() msft = hdev-&gt;msft_data; hdev-&gt;msft_data = NULL; ...(2) klibre(msft); ...(3) &lt;- se libera msft. ==================================================== ================ ERROR: KASAN: slab-use-after-free en __mutex_lock_common kernel/locking/mutex.c:587 [en l\u00ednea] ERROR: KASAN: slab-use-after -free en __mutex_lock+0x8f/0xc30 kernel/locking/mutex.c:752 Lectura de tama\u00f1o 8 en addr ffff888106cbbca8 por tarea kworker/u5:2/309"}], "id": "CVE-2024-36012", "lastModified": "2026-08-04T11:18:22.050", "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"}, {"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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-36012", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-10T18:54:16.912662Z", "version": "2.0.3"}}]}, "published": "2024-05-23T07:15:08.900", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/10f9f426ac6e752c8d87bf4346930ba347aaabac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4f1de02de07748da80a8178879bc7a1df37fdf56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a85a60e62355e3bf4802dead7938966824b23940"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e3880b531b68f98d3941d83f2f6dd11cf4fd6b76"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/10f9f426ac6e752c8d87bf4346930ba347aaabac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4f1de02de07748da80a8178879bc7a1df37fdf56"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a85a60e62355e3bf4802dead7938966824b23940"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e3880b531b68f98d3941d83f2f6dd11cf4fd6b76"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: Bluetooth: msft: fix slab-use-after-free in msft_do_close()", "id": "2282955", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282955"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: msft: fix slab-use-after-free in msft_do_close()\nTying the msft->data lifetime to hdev by freeing it in\nhci_release_dev() to fix the following case:\n[use]\nmsft_do_close()\nmsft = hdev->msft_data;\nif (!msft) ...(1) <- passed.\nreturn;\nmutex_lock(&msft->filter_lock); ...(4) <- used after freed.\n[free]\nmsft_unregister()\nmsft = hdev->msft_data;\nhdev->msft_data = NULL; ...(2)\nkfree(msft); ...(3) <- msft is freed.\n==================================================================\nBUG: KASAN: slab-use-after-free in __mutex_lock_common\nkernel/locking/mutex.c:587 [inline]\nBUG: KASAN: slab-use-after-free in __mutex_lock+0x8f/0xc30\nkernel/locking/mutex.c:752\nRead of size 8 at addr ffff888106cbbca8 by task kworker/u5:2/309"], "name": "CVE-2024-36012", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-36012\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36012\nhttps://lore.kernel.org/linux-cve-announce/2024052314-CVE-2024-36012-3062@gregkh/T"], "threat_severity": "Low"}

{}