{ "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-2026-64364", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64364", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-07-25T08:50:19.441Z", "updatedAt": "2026-10-19T20:38:24.727Z", "importedAt": "2026-10-24T01:58:25.636Z", "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": "HID: multitouch: fix out-of-bounds bit access on mt_io_flags", "summary": "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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "fc488f675344931ffab6a51c43691065ec006567", "status": "affected", "versionType": "git", "lessThan": "12e90656e330ff8bbaf2f29c535fdb8a11cc6f55" }, { "version": "77711d850bed75ae7142c3d1f22c1a8b4d049c33", "status": "affected", "versionType": "git", "lessThan": "152983d87387f6a8ae72b73474cfa55fbcf1ec75" }, { "version": "6acfe25968913788d30ec0eedd80178c4ea3f1d0", "status": "affected", "versionType": "git", "lessThan": "b5c037d6b807017e74a115288f81bc9cd5a5aab8" }, { "version": "d280c138e66be87d1fccfed42593f02fdb893905", "status": "affected", "versionType": "git", "lessThan": "a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d" }, { "version": "f32fea4c0234c971c12e46d76612cdc2dd4bb046", "status": "affected", "versionType": "git", "lessThan": "e24918ee67c4dc3d20d4670750e46e9b160365f4" }, { "version": "46f781e0d151844589dc2125c8cce3300546f92a", "status": "affected", "versionType": "git", "lessThan": "37daa8c96bd563d03150e23f094cb60703594a6d" }, { "version": "46f781e0d151844589dc2125c8cce3300546f92a", "status": "affected", "versionType": "git", "lessThan": "6493ebf9489efef0105078377b973ab33d51af22" }, { "version": "46f781e0d151844589dc2125c8cce3300546f92a", "status": "affected", "versionType": "git", "lessThan": "8813b0612275cc61fe9e6603d0ee019247ade6be" }, { "version": "59bd04163e6451b9c7275277882ed9f4abfa2051", "status": "affected", "versionType": "git" }, { "version": "5.10.246", "status": "affected", "versionType": "semver", "lessThan": "5.10.261" }, { "version": "5.15.196", "status": "affected", "versionType": "semver", "lessThan": "5.15.212" }, { "version": "6.1.158", "status": "affected", "versionType": "semver", "lessThan": "6.1.178" }, { "version": "6.6.114", "status": "affected", "versionType": "semver", "lessThan": "6.6.145" }, { "version": "6.12.55", "status": "affected", "versionType": "semver", "lessThan": "6.12.97" }, { "version": "6.17.5", "status": "affected", "versionType": "semver", "lessThan": "6.18" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.18", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.18" }, { "version": "5.10.261", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.212", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.178", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.145", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.97", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.39", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }