{"id":"CVE-2026-89999","title":"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…","summary":"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…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < d2844f3fcd058113acbe0aa110ab13ef28b98d9f","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < 1bfc0547b81d5861443420d19b5ed2fd533cd17f","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < 84781a1f3c5dc6650480be9329e6e8528939eaa0","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < 96dd0af7597aba2d80cc97e2f66e8b72d30ba125","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < 114af803e409a68e52516810ecd24df4d8ce0c68","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < 74ec08f7b81c2726578039ca6dea0fec136c38ea","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < 0cdc6cb242dd8d2731956fdf3390de094482a4b2","Linux >= 4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b < a8e04f3f894ccb52cfcd7e60125a9f35da4a616d","Linux 4.11"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:23.543","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89999","references":[{"url":"https://git.kernel.org/stable/c/0cdc6cb242dd8d2731956fdf3390de094482a4b2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/114af803e409a68e52516810ecd24df4d8ce0c68","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1bfc0547b81d5861443420d19b5ed2fd533cd17f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/74ec08f7b81c2726578039ca6dea0fec136c38ea","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84781a1f3c5dc6650480be9329e6e8528939eaa0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/96dd0af7597aba2d80cc97e2f66e8b72d30ba125","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a8e04f3f894ccb52cfcd7e60125a9f35da4a616d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d2844f3fcd058113acbe0aa110ab13ef28b98d9f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.947Z","epss":0.0036,"epssPercentile":0.297,"slug":"CVE-2026-89999","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":205045,"id":"CVE-2026-89999","ts":1789570704923,"field":"cvss","old":null,"new":"8.1"},{"seq":205044,"id":"CVE-2026-89999","ts":1789570704923,"field":"severity","old":"none","new":"high"}]}