Type Confusion in Linux kernel - CVE-2026-80694

Vulnerability identifier: #VU146112

CSH Severity: Low

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

CVE-ID: CVE-2026-80694

CWE-ID: CWE-843

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper type handling in mtk_poll_controller and mtk_handle_irq_rx when handling ndo_poll_controller calls with CONFIG_NET_POLL_CONTROLLER enabled. A local user can trigger ndo_poll_controller to cause a denial of service.

The issue results from passing a net_device pointer where a struct mtk_eth pointer is expected.

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/276f1f180f55d56cf5992a581e20ed2b3dfa6ced
• https://git.kernel.org/stable/c/3bd58ac9ca0c552651f533c1bd280dd19ae7d4e8
• https://git.kernel.org/stable/c/7eb46318d53940dab63dea7130e720b67a656104
• https://git.kernel.org/stable/c/e095f249e2209674f6366f6db0383a2b96e19239

• Type Confusion in Linux kernel ethernet mediatek driver
• openEuler 22.03 LTS SP4 update for kernel