In the Linux kernel, the following vulnerability has been resolved:
macvlan: enforce a consistent minimal mtu
macvlan should enforce a minimal mtu of 68, even at link creation.
This patch avoids the current behavior (which could lead to crashes in ipv6 stack if the link is brought up)
$ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail ! $ ip link sh dev macvlan1 5: macvlan1@eno1: <BROADCAST,MULTICAST> mtu 8 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff $ ip link set macvlan1 mtu 67 Error: mtu less than device minimum. $ ip link set macvlan1 mtu 68 $ ip link set macvlan1 mtu 8 Error: mtu less than device minimum.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-livepatch-4.14.301-224.520Upgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernel-livepatch-5.15.86-53.137Upgrade kernelUpgrade kernel-tools-develUpgrade kernel-livepatch-5.10.157-139.675 | Jun 23, 2025 | May 1, 2025 |
| Debian | — | Upgrade linux | May 5, 2025 | May 1, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernelUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernel-abi-stablelists | Oct 24, 2025 | Oct 23, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 1, 2025 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-nvidia-tegra-5.15Upgrade linux-ibm-5.4Upgrade linux-fipsUpgrade linux-aws-hweUpgrade linux-gcp-5.4Upgrade linux-intel-iot-realtimeUpgrade linux-gkeUpgrade linux-awsUpgrade linux-aws-5.15Upgrade linux-riscv-5.15Upgrade linux-azure-fipsUpgrade linux-oracle-5.4Upgrade linuxUpgrade linux-gcp-4.15Upgrade linux-oracleUpgrade linux-gcp-5.15Upgrade linux-iotUpgrade linux-raspi-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-oracle-5.15Upgrade linux-azure-fdeUpgrade linux-raspiUpgrade linux-intel-iotgUpgrade linux-azure-4.15Upgrade linux-lowlatencyUpgrade linux-realtimeUpgrade linux-ibmUpgrade linux-gkeopUpgrade linux-kvmUpgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.4Upgrade linux-aws-fipsUpgrade linux-azureUpgrade linux-gcp-fipsUpgrade linux-azure-5.4Upgrade linux-hweUpgrade linux-aws-5.4Upgrade linux-bluefieldUpgrade linux-nvidiaUpgrade linux-lowlatency-hwe-5.15Upgrade linux-hwe-5.15Upgrade linux-azure-5.15 | May 6, 2025 | May 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 1, 2025 |
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