CVE-2026-64364

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64364", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.783Z", "datePublished": "2026-07-25T08:50:19.441Z", "dateUpdated": "2026-10-19T20:38:24.727Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:54:11.199Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: multitouch: fix out-of-bounds bit access on mt_io_flags\n\nmt_io_flags is a single unsigned long, but mt_process_slot(),\nmt_release_pending_palms() and mt_release_contacts() use it as a\nper-slot bitmap indexed by the slot number. That slot number is only\nbounded by td->maxcontacts, which is taken from the device's\nContactCountMaximum feature report and can be up to 255, not by\nBITS_PER_LONG.\n\nAs a result, a multitouch device that advertises a large contact count\nmakes set_bit()/clear_bit() operate past the mt_io_flags word and\ncorrupt the adjacent members of struct mt_device. The sticky-fingers\nrelease timer is the easiest way to reach this. mt_release_contacts()\nruns\n\n\tfor (i = 0; i < mt->num_slots; i++)\n\t\tclear_bit(i, &td->mt_io_flags);\n\nwith num_slots == maxcontacts. For maxcontacts around 250 the loop\nclears the bits that overlap td->applications.next, zeroing that list\nhead, and the list_for_each_entry() that immediately follows then\ndereferences NULL. The kernel panics from timer (softirq) context. On a\nKASAN build this shows up as a general protection fault in\nmt_release_contacts() with a null-ptr-deref at offset 0x58, which is\noffsetof(struct mt_application, num_received).\n\nThe state is reachable from an untrusted USB or Bluetooth HID\nmultitouch device; no local privileges are required.\n\nStore the per-slot active state in a separately allocated bitmap sized\nfor maxcontacts, the same pattern already used for pending_palm_slots,\nand keep only MT_IO_FLAGS_RUNNING in mt_io_flags. The two\n\"mt_io_flags & MT_IO_SLOTS_MASK\" arming checks become\nbitmap_empty(td->active_slots, td->maxcontacts).\n\nMove MT_IO_FLAGS_RUNNING back to bit 0. It was bumped to bit 32 by the\nsame commit to leave the low byte for the slot bits; with the slot bits\ngone it fits in bit 0 again, which also keeps it within the unsigned\nlong on 32-bit."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - A malicious Bluetooth HID multitouch peripheral within radio range can supply the descriptor, feature value, and input reports; malicious USB devices provide an additional physical path.\nAC:L - Advertising 250 contacts, sending one active contact, and remaining silent for 100 ms deterministically triggers the timer path without a race, heap grooming, or uncontrollable condition.\nPR:N - The external HID device needs no target-system account or capability, and normal HID connection handling delivers its attacker-controlled data to the driver.\nUI:N - An already-connected or automatically reconnecting Bluetooth peripheral can trigger the flaw without victim action; report processing itself requires no file, prompt, or application interaction.\nS:U - The corruption occurs in the host kernel and compromises resources governed by that same kernel security authority.\nC:H - Attacker-controlled out-of-bounds bit operations cover adjacent list pointers and can redirect subsequent kernel memory accesses, supporting kernel compromise and arbitrary disclosure.\nI:H - The device obtains attacker-directed set/clear operations over adjacent pointer fields, enabling crafted pointer corruption, further kernel writes, and potentially code execution.\nA:H - The deterministic timeout path corrupts the applications list and causes a kernel panic from softirq context, and a malicious peripheral can trigger it repeatedly."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-multitouch.c"], "versions": [{"version": "fc488f675344931ffab6a51c43691065ec006567", "lessThan": "12e90656e330ff8bbaf2f29c535fdb8a11cc6f55", "status": "affected", "versionType": "git"}, {"version": "77711d850bed75ae7142c3d1f22c1a8b4d049c33", "lessThan": "152983d87387f6a8ae72b73474cfa55fbcf1ec75", "status": "affected", "versionType": "git"}, {"version": "6acfe25968913788d30ec0eedd80178c4ea3f1d0", "lessThan": "b5c037d6b807017e74a115288f81bc9cd5a5aab8", "status": "affected", "versionType": "git"}, {"version": "d280c138e66be87d1fccfed42593f02fdb893905", "lessThan": "a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d", "status": "affected", "versionType": "git"}, {"version": "f32fea4c0234c971c12e46d76612cdc2dd4bb046", "lessThan": "e24918ee67c4dc3d20d4670750e46e9b160365f4", "status": "affected", "versionType": "git"}, {"version": "46f781e0d151844589dc2125c8cce3300546f92a", "lessThan": "37daa8c96bd563d03150e23f094cb60703594a6d", "status": "affected", "versionType": "git"}, {"version": "46f781e0d151844589dc2125c8cce3300546f92a", "lessThan": "6493ebf9489efef0105078377b973ab33d51af22", "status": "affected", "versionType": "git"}, {"version": "46f781e0d151844589dc2125c8cce3300546f92a", "lessThan": "8813b0612275cc61fe9e6603d0ee019247ade6be", "status": "affected", "versionType": "git"}, {"version": "59bd04163e6451b9c7275277882ed9f4abfa2051", "status": "affected", "versionType": "git"}, {"version": "5.10.246", "lessThan": "5.10.261", "status": "affected", "versionType": "semver"}, {"version": "5.15.196", "lessThan": "5.15.212", "status": "affected", "versionType": "semver"}, {"version": "6.1.158", "lessThan": "6.1.178", "status": "affected", "versionType": "semver"}, {"version": "6.6.114", "lessThan": "6.6.145", "status": "affected", "versionType": "semver"}, {"version": "6.12.55", "lessThan": "6.12.97", "status": "affected", "versionType": "semver"}, {"version": "6.17.5", "lessThan": "6.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-multitouch.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.10.246", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.196", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.158", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.114", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.55", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/12e90656e330ff8bbaf2f29c535fdb8a11cc6f55"}, {"url": "https://git.kernel.org/stable/c/152983d87387f6a8ae72b73474cfa55fbcf1ec75"}, {"url": "https://git.kernel.org/stable/c/b5c037d6b807017e74a115288f81bc9cd5a5aab8"}, {"url": "https://git.kernel.org/stable/c/a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d"}, {"url": "https://git.kernel.org/stable/c/e24918ee67c4dc3d20d4670750e46e9b160365f4"}, {"url": "https://git.kernel.org/stable/c/37daa8c96bd563d03150e23f094cb60703594a6d"}, {"url": "https://git.kernel.org/stable/c/6493ebf9489efef0105078377b973ab33d51af22"}, {"url": "https://git.kernel.org/stable/c/8813b0612275cc61fe9e6603d0ee019247ade6be"}], "title": "HID: multitouch: fix out-of-bounds bit access on mt_io_flags", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64364", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:39:27.209380Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:38:24.727Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64364", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:39:27.209380Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:39:27.762Z"}}], "cna": {"title": "HID: multitouch: fix out-of-bounds bit access on mt_io_flags", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:A - A malicious Bluetooth HID multitouch peripheral within radio range can supply the descriptor, feature value, and input reports; malicious USB devices provide an additional physical path.\nAC:L - Advertising 250 contacts, sending one active contact, and remaining silent for 100 ms deterministically triggers the timer path without a race, heap grooming, or uncontrollable condition.\nPR:N - The external HID device needs no target-system account or capability, and normal HID connection handling delivers its attacker-controlled data to the driver.\nUI:N - An already-connected or automatically reconnecting Bluetooth peripheral can trigger the flaw without victim action; report processing itself requires no file, prompt, or application interaction.\nS:U - The corruption occurs in the host kernel and compromises resources governed by that same kernel security authority.\nC:H - Attacker-controlled out-of-bounds bit operations cover adjacent list pointers and can redirect subsequent kernel memory accesses, supporting kernel compromise and arbitrary disclosure.\nI:H - The device obtains attacker-directed set/clear operations over adjacent pointer fields, enabling crafted pointer corruption, further kernel writes, and potentially code execution.\nA:H - The deterministic timeout path corrupts the applications list and causes a kernel panic from softirq context, and a malicious peripheral can trigger it repeatedly."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "fc488f675344931ffab6a51c43691065ec006567", "lessThan": "12e90656e330ff8bbaf2f29c535fdb8a11cc6f55", "versionType": "git"}, {"status": "affected", "version": "77711d850bed75ae7142c3d1f22c1a8b4d049c33", "lessThan": "152983d87387f6a8ae72b73474cfa55fbcf1ec75", "versionType": "git"}, {"status": "affected", "version": "6acfe25968913788d30ec0eedd80178c4ea3f1d0", "lessThan": "b5c037d6b807017e74a115288f81bc9cd5a5aab8", "versionType": "git"}, {"status": "affected", "version": "d280c138e66be87d1fccfed42593f02fdb893905", "lessThan": "a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d", "versionType": "git"}, {"status": "affected", "version": "f32fea4c0234c971c12e46d76612cdc2dd4bb046", "lessThan": "e24918ee67c4dc3d20d4670750e46e9b160365f4", "versionType": "git"}, {"status": "affected", "version": "46f781e0d151844589dc2125c8cce3300546f92a", "lessThan": "37daa8c96bd563d03150e23f094cb60703594a6d", "versionType": "git"}, {"status": "affected", "version": "46f781e0d151844589dc2125c8cce3300546f92a", "lessThan": "6493ebf9489efef0105078377b973ab33d51af22", "versionType": "git"}, {"status": "affected", "version": "46f781e0d151844589dc2125c8cce3300546f92a", "lessThan": "8813b0612275cc61fe9e6603d0ee019247ade6be", "versionType": "git"}, {"status": "affected", "version": "59bd04163e6451b9c7275277882ed9f4abfa2051", "versionType": "git"}, {"status": "affected", "version": "5.10.246", "lessThan": "5.10.261", "versionType": "semver"}, {"status": "affected", "version": "5.15.196", "lessThan": "5.15.212", "versionType": "semver"}, {"status": "affected", "version": "6.1.158", "lessThan": "6.1.178", "versionType": "semver"}, {"status": "affected", "version": "6.6.114", "lessThan": "6.6.145", "versionType": "semver"}, {"status": "affected", "version": "6.12.55", "lessThan": "6.12.97", "versionType": "semver"}, {"status": "affected", "version": "6.17.5", "lessThan": "6.18", "versionType": "semver"}], "programFiles": ["drivers/hid/hid-multitouch.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"status": "unaffected", "version": "0", "lessThan": "6.18", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.39", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.4", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hid/hid-multitouch.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/12e90656e330ff8bbaf2f29c535fdb8a11cc6f55"}, {"url": "https://git.kernel.org/stable/c/152983d87387f6a8ae72b73474cfa55fbcf1ec75"}, {"url": "https://git.kernel.org/stable/c/b5c037d6b807017e74a115288f81bc9cd5a5aab8"}, {"url": "https://git.kernel.org/stable/c/a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d"}, {"url": "https://git.kernel.org/stable/c/e24918ee67c4dc3d20d4670750e46e9b160365f4"}, {"url": "https://git.kernel.org/stable/c/37daa8c96bd563d03150e23f094cb60703594a6d"}, {"url": "https://git.kernel.org/stable/c/6493ebf9489efef0105078377b973ab33d51af22"}, {"url": "https://git.kernel.org/stable/c/8813b0612275cc61fe9e6603d0ee019247ade6be"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: multitouch: fix out-of-bounds bit access on mt_io_flags\n\nmt_io_flags is a single unsigned long, but mt_process_slot(),\nmt_release_pending_palms() and mt_release_contacts() use it as a\nper-slot bitmap indexed by the slot number. That slot number is only\nbounded by td->maxcontacts, which is taken from the device's\nContactCountMaximum feature report and can be up to 255, not by\nBITS_PER_LONG.\n\nAs a result, a multitouch device that advertises a large contact count\nmakes set_bit()/clear_bit() operate past the mt_io_flags word and\ncorrupt the adjacent members of struct mt_device. The sticky-fingers\nrelease timer is the easiest way to reach this. mt_release_contacts()\nruns\n\n\tfor (i = 0; i < mt->num_slots; i++)\n\t\tclear_bit(i, &td->mt_io_flags);\n\nwith num_slots == maxcontacts. For maxcontacts around 250 the loop\nclears the bits that overlap td->applications.next, zeroing that list\nhead, and the list_for_each_entry() that immediately follows then\ndereferences NULL. The kernel panics from timer (softirq) context. On a\nKASAN build this shows up as a general protection fault in\nmt_release_contacts() with a null-ptr-deref at offset 0x58, which is\noffsetof(struct mt_application, num_received).\n\nThe state is reachable from an untrusted USB or Bluetooth HID\nmultitouch device; no local privileges are required.\n\nStore the per-slot active state in a separately allocated bitmap sized\nfor maxcontacts, the same pattern already used for pending_palm_slots,\nand keep only MT_IO_FLAGS_RUNNING in mt_io_flags. The two\n\"mt_io_flags & MT_IO_SLOTS_MASK\" arming checks become\nbitmap_empty(td->active_slots, td->maxcontacts).\n\nMove MT_IO_FLAGS_RUNNING back to bit 0. It was bumped to bit 32 by the\nsame commit to leave the low byte for the slot bits; with the slot bits\ngone it fits in bit 0 again, which also keeps it within the unsigned\nlong on 32-bit."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "5.10.246"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "5.15.196"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "6.1.158"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "6.6.114"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "6.12.55"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.39", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.17.5"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:54:11.199Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64364", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:38:24.727Z", "dateReserved": "2026-07-19T15:36:31.783Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-25T08:50:19.441Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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That slot number is only\nbounded by td->maxcontacts, which is taken from the device's\nContactCountMaximum feature report and can be up to 255, not by\nBITS_PER_LONG.\n\nAs a result, a multitouch device that advertises a large contact count\nmakes set_bit()/clear_bit() operate past the mt_io_flags word and\ncorrupt the adjacent members of struct mt_device. The sticky-fingers\nrelease timer is the easiest way to reach this. mt_release_contacts()\nruns\n\n\tfor (i = 0; i < mt->num_slots; i++)\n\t\tclear_bit(i, &td->mt_io_flags);\n\nwith num_slots == maxcontacts. For maxcontacts around 250 the loop\nclears the bits that overlap td->applications.next, zeroing that list\nhead, and the list_for_each_entry() that immediately follows then\ndereferences NULL. The kernel panics from timer (softirq) context. On a\nKASAN build this shows up as a general protection fault in\nmt_release_contacts() with a null-ptr-deref at offset 0x58, which is\noffsetof(struct mt_application, num_received).\n\nThe state is reachable from an untrusted USB or Bluetooth HID\nmultitouch device; no local privileges are required.\n\nStore the per-slot active state in a separately allocated bitmap sized\nfor maxcontacts, the same pattern already used for pending_palm_slots,\nand keep only MT_IO_FLAGS_RUNNING in mt_io_flags. The two\n\"mt_io_flags & MT_IO_SLOTS_MASK\" arming checks become\nbitmap_empty(td->active_slots, td->maxcontacts).\n\nMove MT_IO_FLAGS_RUNNING back to bit 0. It was bumped to bit 32 by the\nsame commit to leave the low byte for the slot bits; with the slot bits\ngone it fits in bit 0 again, which also keeps it within the unsigned\nlong on 32-bit."}], "id": "CVE-2026-64364", "lastModified": "2026-10-19T21:17:32.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64364", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:39:27.209380Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:19.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/12e90656e330ff8bbaf2f29c535fdb8a11cc6f55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/152983d87387f6a8ae72b73474cfa55fbcf1ec75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37daa8c96bd563d03150e23f094cb60703594a6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6493ebf9489efef0105078377b973ab33d51af22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8813b0612275cc61fe9e6603d0ee019247ade6be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b5c037d6b807017e74a115288f81bc9cd5a5aab8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e24918ee67c4dc3d20d4670750e46e9b160365f4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: HID: multitouch: fix out-of-bounds bit access on mt_io_flags", "id": "2507220", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507220"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's Human Interface Device (HID) multitouch subsystem. A remote attacker can exploit this vulnerability by connecting a specially crafted multitouch device that advertises a large contact count. This can lead to an out-of-bounds bit access, corrupting adjacent memory and causing a kernel panic, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-64364", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "impact": "moderate", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "moderate", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64364\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64364\nhttps://lore.kernel.org/linux-cve-announce/2026072521-CVE-2026-64364-7c96@gregkh/T"], "threat_severity": "Important"}

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