Input: goodix - clamp the device-reported contact count
Summary
| CVE | CVE-2026-64274 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-25 10:17:07 UTC |
| Updated | 2026-07-30 15:00:27 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: Input: goodix - clamp the device-reported contact count goodix_ts_read_input_report() copies the number of touch points reported by the device into an on-stack buffer u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; which is sized for at most GOODIX_MAX_CONTACTS (10) contacts. The only runtime check bounds the per-interrupt count against ts->max_touch_num, but that value is taken verbatim from a 4-bit field of the device configuration block and is never clamped: ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; The nibble can be 0..15, so a malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can advertise up to 15 contacts. goodix_ts_read_input_report() then accepts a touch_num of up to 15 and the second goodix_i2c_read() writes ts->contact_size * (touch_num - 1) bytes past the one-contact header into point_data - up to 30 bytes (45 with the 9-byte report format) beyond the 92-byte buffer: a stack out-of-bounds write. Clamp max_touch_num to GOODIX_MAX_CONTACTS, the number of contacts point_data[] is sized for, when reading it from the configuration. |
Risk And Classification
EPSS: 0.002110000 probability, percentile 0.114320000 (date 2026-08-03)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f e825f352ef5271255cd08cc994b0dc25648a2f38 git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 4bfea9c3a0981c1c7fc5d1a1b27197b2de247902 git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 98b2caef249183b572c04451365246f919707845 git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 719d1a2c83a46be6bf81af905e4f6adb3d32dc28 git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 46addbd13dbf4aacb71cfbca964a5e552d0f45ae git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 3b32303460155603d25444274856013d211d5e1f git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 2a67668690129953e898923260a2dd1c7c196495 git | Not specified |
| CNA | Linux | Linux | affected a7ac7c95d4682883d141c5d7a7544d2818f0a09f 5ed62a96e06be4e94b8296b7932afee550a70e04 git | Not specified |
| CNA | Linux | Linux | affected 4.1 | Not specified |
| CNA | Linux | Linux | unaffected 4.1 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.96 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.39 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.4 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/46addbd13dbf4aacb71cfbca964a5e552d0f45ae | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/719d1a2c83a46be6bf81af905e4f6adb3d32dc28 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5ed62a96e06be4e94b8296b7932afee550a70e04 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3b32303460155603d25444274856013d211d5e1f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2a67668690129953e898923260a2dd1c7c196495 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/98b2caef249183b572c04451365246f919707845 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4bfea9c3a0981c1c7fc5d1a1b27197b2de247902 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e825f352ef5271255cd08cc994b0dc25648a2f38 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.