{"id":"CVE-2026-64274","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-64274","summary":"Input: goodix - clamp the device-reported contact count","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: goodix - clamp the device-reported contact count\n\ngoodix_ts_read_input_report() copies the number of touch points reported\nby the device into an on-stack buffer\n\n\tu8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];\n\nwhich is sized for at most GOODIX_MAX_CONTACTS (10) contacts. The only\nruntime check bounds the per-interrupt count against ts->max_touch_num,\nbut that value is taken verbatim from a 4-bit field of the device\nconfiguration block and is never clamped:\n\n\tts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;\n\nThe nibble can be 0..15, so a malfunctioning, malicious or counterfeit\ncontroller (or an attacker tampering with the I2C bus) can advertise up\nto 15 contacts. goodix_ts_read_input_report() then accepts a touch_num\nof up to 15 and the second goodix_i2c_read() writes\nts->contact_size * (touch_num - 1) bytes past the one-contact header into\npoint_data - up to 30 bytes (45 with the 9-byte report format) beyond the\n92-byte buffer: a stack out-of-bounds write.\n\nClamp max_touch_num to GOODIX_MAX_CONTACTS, the number of contacts\npoint_data[] is sized for, when reading it from the configuration.","published":"2026-07-25T08:49:20.040Z","modified":"2026-08-12T03:51:38.843286984Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.261"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2a67668690129953e898923260a2dd1c7c196495"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3b32303460155603d25444274856013d211d5e1f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46addbd13dbf4aacb71cfbca964a5e552d0f45ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4bfea9c3a0981c1c7fc5d1a1b27197b2de247902"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5ed62a96e06be4e94b8296b7932afee550a70e04"},{"type":"WEB","url":"https://git.kernel.org/stable/c/719d1a2c83a46be6bf81af905e4f6adb3d32dc28"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98b2caef249183b572c04451365246f919707845"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e825f352ef5271255cd08cc994b0dc25648a2f38"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64274.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64274"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:38.843286984Z"}}