Out-of-bounds write in Linux kernel - CVE-2026-80569

Vulnerability identifier: #VU145924

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-80569

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to an out-of-bounds write in the synaptics-rmi4 F54 diagnostics report handling in rmi_f54_work() when processing a malicious or malfunctioning RMI4 device report with larger F55 electrode counts than F54 counts. A local user can provide a specially crafted device that reports inconsistent electrode counts to execute arbitrary code.

The issue can also cause an out-of-bounds read during the subsequent V4L2 dequeue memcpy().

Linux kernel
openEuler
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - update to 5.10.0-334.0.0.235
bpftool - update to 5.10.0-334.0.0.235
bpftool-debuginfo - update to 5.10.0-334.0.0.235
kernel-debuginfo - update to 5.10.0-334.0.0.235
kernel-debugsource - update to 5.10.0-334.0.0.235
kernel-devel - update to 5.10.0-334.0.0.235
kernel-headers - update to 5.10.0-334.0.0.235
kernel-source - update to 5.10.0-334.0.0.235
kernel-tools - update to 5.10.0-334.0.0.235
kernel-tools-debuginfo - update to 5.10.0-334.0.0.235
kernel-tools-devel - update to 5.10.0-334.0.0.235
perf - update to 5.10.0-334.0.0.235
perf-debuginfo - update to 5.10.0-334.0.0.235
python3-perf - update to 5.10.0-334.0.0.235
python3-perf-debuginfo - update to 5.10.0-334.0.0.235

• https://git.kernel.org/stable/c/12be3c6ca9589afd6ade41a59c761866e526634d
• https://git.kernel.org/stable/c/42eaf0e6f79c487f419737314cf0760f7331d368
• https://git.kernel.org/stable/c/49c5adc2b7d6e43c5cf033e1c86fdb9c16ababb1
• https://git.kernel.org/stable/c/6b06aab79ff166d5781ce792d91acc2e58b1770b
• https://git.kernel.org/stable/c/6b3bdd44d4cd7d5e35de1d0f06d4930f3cecd403
• https://git.kernel.org/stable/c/b2f596f00d27703ce09167201ba57f55be8d2f9a
• https://git.kernel.org/stable/c/b3932101c9c457148038392bc977f9b31e125a86
• https://git.kernel.org/stable/c/b7b9a8b1c303b62371698e396654d6724c79cb74

• Out-of-bounds write in Linux kernel input rmi4 driver
• openEuler 22.03 LTS SP4 update for kernel