{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89999", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.780Z", "datePublished": "2026-09-16T10:33:10.683Z", "dateUpdated": "2026-10-19T08:56:13.267Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:56:13.267Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: validate report length in wacom_intuos_pro2_bt_irq\n\nwacom_intuos_pro2_bt_irq() receives the wire report length in `len`\nbut never consults it before parsing. After the report-id gate it\nunconditionally calls wacom_intuos_pro2_bt_pen() and then, selected by\nfeatures.type, a fixed chain of sub-parsers, none of which receive\n`len`:\n\n\twacom_intuos_pro2_bt_pen(wacom);\n\tif (type == INTUOSP2_BT || type == INTUOSP2S_BT) {\n\t\twacom_intuos_pro2_bt_touch(wacom);\n\t\twacom_intuos_pro2_bt_pad(wacom);\n\t\twacom_intuos_pro2_bt_battery(wacom);\n\t} else {\n\t\twacom_intuos_gen3_bt_pad(wacom);\n\t\twacom_intuos_gen3_bt_battery(wacom);\n\t}\n\nEach sub-parser dereferences wacom->data at fixed offsets. The furthest\nbyte touched on each branch is:\n\n INTUOSP2_BT / INTUOSP2S_BT: wacom_intuos_pro2_bt_pad() reads data[285]\n\t(the touchring byte), so the report must be at least 286 bytes;\n INTUOSHT3_BT (\"gen3\"): wacom_intuos_gen3_bt_battery() reads data[45],\n\tso the report must be at least 46 bytes.\n\nfeatures.type is selected from the VID/PID id_table entry and\nwacom_setup_device_quirks() force-registers the pen/pad/touch inputs\nfor that type independent of the report descriptor, so a malicious or\nmalfunctioning paired/spoofed Bluetooth peripheral can advertise that\nVID/PID and send an undersized report that still satisfies the\ndata[0] == 0x80/0x81 gate. The driver then reads past the received\nreport and forwards the bytes to userspace via evdev (MSC_SERIAL /\nABS_MISC / ABS_WHEEL on the pen and pad input nodes), an out-of-bounds\nread with a concrete userspace read-back channel, and a true\nout-of-bounds read on transports whose backing buffer is sized to the\n(small) report descriptor rather than a fixed-size staging buffer.\n\nThis is the same class of bug commit 2f1763f62909 (\"HID: wacom: fix\nout-of-bounds read in wacom_intuos_bt_irq\") already hardened in the\nsibling wacom_intuos_bt_irq(), which guards each report id against its\nminimum length before parsing.\n\nGuard wacom_intuos_pro2_bt_irq() the same way: before parsing, reject\nreports shorter than the furthest offset the selected branch actually\ndereferences, warn, and bail out. Because the whole pen/touch/pad/\nbattery chain runs unconditionally per branch, a single up-front check\nagainst the maximum offset (286 bytes for INTUOSP2_BT/INTUOSP2S_BT,\n46 bytes for the gen3 branch) bounds every sub-parser. Returning 0 on\na short report also skips those calls for the same malformed report,\nwhich is the safe, conservative behavior." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - wacom_intuos_pro2_bt_irq() is reached only for BUS_BLUETOOTH Wacom Intuos Pro/HT3 devices (VID 0x056a, PIDs 0x360/0x361/0x377/0x379/0x393/0x3c6/0x3c8/0x3dd) via hidp/uhid HID input reports over L2CAP, so the attacker must be a Bluetooth HID peer on the same radio segment.\nAC:L - The attacker fully controls the HID report ID, descriptor, and wire length; any report with data[0]==0x80/0x81 that hid_get_report() accepts is parsed at fixed offsets with no length check, so a short report reliably triggers the OOB read.\nPR:N - The attacker is the Bluetooth HID peripheral sending input reports and needs no local account or capability; BlueZ/hidp connection setup is a host-side management path, not a privilege required of the reporting device.\nUI:N - After a paired, spoofed, or already-connected Intuos Pro/HT3 Bluetooth HID session exists, the peer can emit the short 0x80/0x81 report on the interrupt channel without further victim clicks, pairing prompts, or mounts.\nS:U - The Wacom HID parser and the resulting kernel/input/power_supply impact remain under the same host kernel security authority, with no VM escape, IOMMU/DMA bypass, or other cross-boundary effect.\nC:H - The parsers read wacom->data at fixed offsets through data[285] (286 bytes) ignoring len, which is a kernel OOB read, and those bytes are reported to userspace via evdev (MSC_SERIAL, ABS_MISC, ABS_WHEEL, pen/touch axes), a concrete disclosure channel.\nI:N - The defect is an out-of-bounds read of the HID report buffer, not an OOB write or UAF, and it does not yield an attacker-controlled kernel memory modification or control-flow hijack primitive.\nA:H - Reading hundreds of bytes past a short HID report can fault when the transport buffer is sized to the received report or descriptor rather than a large staging buffer, and an adjacent peer can repeat the malformed report to panic or oops the host." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/wacom_wac.c" ], "versions": [ { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "d2844f3fcd058113acbe0aa110ab13ef28b98d9f", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "1bfc0547b81d5861443420d19b5ed2fd533cd17f", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "84781a1f3c5dc6650480be9329e6e8528939eaa0", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "96dd0af7597aba2d80cc97e2f66e8b72d30ba125", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "114af803e409a68e52516810ecd24df4d8ce0c68", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "74ec08f7b81c2726578039ca6dea0fec136c38ea", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "0cdc6cb242dd8d2731956fdf3390de094482a4b2", "status": "affected", "versionType": "git" }, { "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b", "lessThan": "a8e04f3f894ccb52cfcd7e60125a9f35da4a616d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/wacom_wac.c" ], "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "4.11", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.18.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d2844f3fcd058113acbe0aa110ab13ef28b98d9f" }, { "url": "https://git.kernel.org/stable/c/1bfc0547b81d5861443420d19b5ed2fd533cd17f" }, { "url": "https://git.kernel.org/stable/c/84781a1f3c5dc6650480be9329e6e8528939eaa0" }, { "url": "https://git.kernel.org/stable/c/96dd0af7597aba2d80cc97e2f66e8b72d30ba125" }, { "url": "https://git.kernel.org/stable/c/114af803e409a68e52516810ecd24df4d8ce0c68" }, { "url": "https://git.kernel.org/stable/c/74ec08f7b81c2726578039ca6dea0fec136c38ea" }, { "url": "https://git.kernel.org/stable/c/0cdc6cb242dd8d2731956fdf3390de094482a4b2" }, { "url": "https://git.kernel.org/stable/c/a8e04f3f894ccb52cfcd7e60125a9f35da4a616d" } ], "title": "HID: wacom: validate report length in wacom_intuos_pro2_bt_irq", "x_generator": { "engine": "bippy-1.2.0" } } } }