Out-of-bounds Write Affecting linux-6.12 package, versions <6.12.100-1~deb12u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-ECHOLATEST-LINUX612-18579144
  • published7 Aug 2026
  • disclosed25 Jul 2026

Introduced: 25 Jul 2026

CVE-2026-64274  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Echo:latest linux-6.12 to version 6.12.100-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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-&gt;max_touch_num = ts-&gt;config[MAX_CONTACTS_LOC] &amp; 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.

CVSS Base Scores

version 3.1