Out-of-bounds write in Linux kernel - CVE-2026-89729

Vulnerability identifier: #VU149072

CSH Severity: Low

CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-89729

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows an attacker with physical access to cause an out-of-bounds write.

The vulnerability exists due to an out-of-bounds write in sensor_hub_get_feature() when processing a malicious HID descriptor. An attacker with physical access can provide a HID descriptor advertising a large feature field size to cause an out-of-bounds write.

An IIO caller supplying a small stack buffer can be affected.

Linux kernel
openEuler
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python2-perf
python2-perf-debuginfo
python3-perf
python3-perf-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - update to 4.19.90-2609.3.0.0391
bpftool - update to 4.19.90-2609.3.0.0391
bpftool-debuginfo - update to 4.19.90-2609.3.0.0391
kernel-debuginfo - update to 4.19.90-2609.3.0.0391
kernel-debugsource - update to 4.19.90-2609.3.0.0391
kernel-devel - update to 4.19.90-2609.3.0.0391
kernel-source - update to 4.19.90-2609.3.0.0391
kernel-tools - update to 4.19.90-2609.3.0.0391
kernel-tools-debuginfo - update to 4.19.90-2609.3.0.0391
kernel-tools-devel - update to 4.19.90-2609.3.0.0391
perf - update to 4.19.90-2609.3.0.0391
perf-debuginfo - update to 4.19.90-2609.3.0.0391
python2-perf - update to 4.19.90-2609.3.0.0391
python2-perf-debuginfo - update to 4.19.90-2609.3.0.0391
python3-perf - update to 4.19.90-2609.3.0.0391
python3-perf-debuginfo - update to 4.19.90-2609.3.0.0391

• https://git.kernel.org/stable/c/9f43499ce6458a572b781f6bb46c464ab59fa825
• https://git.kernel.org/stable/c/bc3d72c44bff17688dc5f3e5132a53b51dae0f04
• https://git.kernel.org/stable/c/c92693f3ed099401d0383ef35ca1fe1e6ba033de
• https://git.kernel.org/stable/c/fa95b14198b6c8ea721b4784f466d3c2c2bac83a

• Out-of-bounds write in Linux kernel hid driver
• openEuler 20.03 LTS SP4 update for kernel