Improper input validation in Linux kernel - CVE-2026-72397

Vulnerability identifier: #VU143039

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-72397

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to send incorrect voltage commands to a PMBus device.

The vulnerability exists due to improper input validation in pmbus_data2reg_vid() in the pmbus core when converting user-supplied voltage values for PMBUS_VOUT_COMMAND. A local user can request a voltage using a non-VR11 VID mode to send incorrect voltage commands to a PMBus device.

Only drivers that select a non-VR11 VID mode and expose a regulator or hwmon vout setter are affected.

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/5bd0d47640395f8a8c34446b62d1781b88869dfa
• https://git.kernel.org/stable/c/828cd614e2af053ca5e1d6da767bbd8a1b5cabfb

• Improper input validation in Linux kernel hwmon pmbus driver
• openEuler 22.03 LTS SP4 update for kernel