Input: goodix - clamp the device-reported contact count

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64274
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:07 UTC
Updated2026-08-17 05:17:26 UTC
DescriptionIn 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

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002110000 probability, percentile 0.114320000 (date 2026-08-03)

Problem Types: CWE-787

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
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 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/46addbd13dbf4aacb71cfbca964a5e552d0f45ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/719d1a2c83a46be6bf81af905e4f6adb3d32dc28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5ed62a96e06be4e94b8296b7932afee550a70e04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3b32303460155603d25444274856013d211d5e1f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2a67668690129953e898923260a2dd1c7c196495 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/98b2caef249183b572c04451365246f919707845 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4bfea9c3a0981c1c7fc5d1a1b27197b2de247902 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e825f352ef5271255cd08cc994b0dc25648a2f38 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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