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Vulnerability record · CVE-2026-64276 · published 25 July 2026

CVE-2026-64276: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count rmi_f30_map_gpios() allocates gpioled_key_map with min(gpioled_count, TRACKSTICK_RANGE_END) == at most 6 entries, but rmi_f30_attention() iterates the full f30->gpioled_count (device query register, range 0..31) and dereferences gpioled_key_map[i], and input->keycodemax is set to the full gpioled_count while input->keycode points at the 6-entry allocation. A device that reports gpioled_count > 6 with GPIO support enabled therefore causes an out-of-bounds read on the attention interrupt and out-of-bounds read/write through the EVIOCGKEYCODE/EVIOCSKEYCODE ioctls, which bound the index only against keycodemax. This is the same defect as the F3A handler, which was copied from F30. Size the keymap for the full gpioled_count; the mapping loop still assigns only the first min(gpioled_count, TRACKSTICK_RANGE_END) entries.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.5% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Aug 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count rmi_f30_map_gpios() allocates gpioled_key_map with min(gpioled_count, TRACKSTICK_RANGE_END) == at most 6 entries, but rmi_f30_attention() iterates the full f30->gpioled_count (device query register, range 0..31) and dereferences gpioled_key_map[i], and input->keycodemax is set to the full gpioled_count while input->keycode points at the 6-entry allocation. A device that reports gpioled_count > 6 with GPIO support enabled therefore causes an out-of-bounds read on the attention interrupt and out-of-bounds read/write through the EVIOCGKEYCODE/EVIOCSKEYCODE ioctls, which bound the index only against keycodemax. This is the same defect as the F3A handler, which was copied from F30. Size the keymap for the full gpioled_count; the mapping loop still assigns only the first min(gpioled_count, TRACKSTICK_RANGE_END) entries.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/26c895928d7118436a24f564587cb4aefc40cdd8 Patch
https://git.kernel.org/stable/c/4e3689c26854356f41fbaa1eafa382e58ac79e00 Patch
https://git.kernel.org/stable/c/8c6d18d61bb6fe0e6edf848413391c590552e8a9 Patch
https://git.kernel.org/stable/c/bfe622efecd4ff0a792d0ecd1a8dce535a902f50 Patch
https://git.kernel.org/stable/c/d162a1ead7de404d8b41a093c83ed0db6487cded Patch
https://git.kernel.org/stable/c/d577e46785d45484b2ab7e7309c49b18764bf56c Patch
https://git.kernel.org/stable/c/e849c6f51e6877104c765da084e001ec37c8e119 Patch
https://git.kernel.org/stable/c/f0be9eba946e9200b43265e0a748d38bd0a56954 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64276), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.