{"id":"CVE-2026-89999","revision":"6177bc0f60d1488ea3f4a7031ee57e38","records":[{"revision":"6177bc0f60d1488ea3f4a7031ee57e38","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89999","aliases":[],"title":"HID: wacom: validate report length in wacom_intuos_pro2_bt_irq","description":"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.","state":0,"publishedAt":"2026-09-16T10:33:10.683+00:00","modifiedAt":"2026-10-19T08:56:13.267+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/hid/wacom_wac.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"d2844f3fcd058113acbe0aa110ab13ef28b98d9f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"1bfc0547b81d5861443420d19b5ed2fd533cd17f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"84781a1f3c5dc6650480be9329e6e8528939eaa0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"96dd0af7597aba2d80cc97e2f66e8b72d30ba125\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"114af803e409a68e52516810ecd24df4d8ce0c68\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"74ec08f7b81c2726578039ca6dea0fec136c38ea\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"0cdc6cb242dd8d2731956fdf3390de094482a4b2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b\",\n \"lessThan\": \"a8e04f3f894ccb52cfcd7e60125a9f35da4a616d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/hid/wacom_wac.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.270\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.221\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.188\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.157\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.110\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.51\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.5\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d2844f3fcd058113acbe0aa110ab13ef28b98d9f","https://git.kernel.org/stable/c/1bfc0547b81d5861443420d19b5ed2fd533cd17f","https://git.kernel.org/stable/c/84781a1f3c5dc6650480be9329e6e8528939eaa0","https://git.kernel.org/stable/c/96dd0af7597aba2d80cc97e2f66e8b72d30ba125","https://git.kernel.org/stable/c/114af803e409a68e52516810ecd24df4d8ce0c68","https://git.kernel.org/stable/c/74ec08f7b81c2726578039ca6dea0fec136c38ea","https://git.kernel.org/stable/c/0cdc6cb242dd8d2731956fdf3390de094482a4b2","https://git.kernel.org/stable/c/a8e04f3f894ccb52cfcd7e60125a9f35da4a616d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89999","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89999","identifiers":["CVE-2026-89999"]},"retained":false,"historicalAffected":[]}],"coverage":[]}