Improper access control in Linux kernel - CVE-2026-72061

Vulnerability identifier: #VU143535

CSH Severity: Low

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-72061

CWE-ID: CWE-284

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to modify tunnel configuration across network namespaces.

The vulnerability exists due to improper access control in ipip6_changelink() in the sit tunnel handler when handling changelink requests for a tunnel whose link network namespace differs from the device network namespace. A local privileged user can send a changelink request to modify tunnel configuration across network namespaces.

The issue occurs when the caller has CAP_NET_ADMIN in the device network namespace but not in the tunnel link network namespace.

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

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
python3-perf - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-devel - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-source - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-headers - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-devel - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debugsource - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-extra-modules - update to 6.6.0-145.3.29.160

• https://git.kernel.org/stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3
• https://git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65
• https://git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305
• https://git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f
• https://git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd
• https://git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73
• https://git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932
• https://git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480

• Improper access control in Linux kernel ipv6
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel