In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_skbmod: Skip non-Ethernet packets
Currently tcf_skbmod_act() assumes that packets use Ethernet as their L2 protocol, which is not always the case. As an example, for CAN devices:
$ ip link add dev vcan0 type vcan $ ip link set up vcan0 $ tc qdisc add dev vcan0 root handle 1: htb $ tc filter add dev vcan0 parent 1: protocol ip prio 10 \ matchall action skbmod swap mac
Doing the above silently corrupts all the packets. Do not perform skbmod actions for non-Ethernet packets.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-libs | Oct 8, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernel-tools-libsUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel | Oct 8, 2024 | May 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 21, 2024 |
| Suse | — | Upgrade kernel-default-extraUpgrade kernel-symsUpgrade kernel-azure-baseUpgrade kernel-source-azureUpgrade kernel-default-develUpgrade kernel-develUpgrade kernel-default-baseUpgrade kernel-syms-azureUpgrade kernel-azureUpgrade kernel-devel-azureUpgrade kernel-defaultUpgrade kernel-docsUpgrade kernel-default-manUpgrade kernel-obs-buildUpgrade kernel-sourceUpgrade kernel-macrosUpgrade kernel-azure-devel | Aug 9, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-azure-fipsUpgrade linuxUpgrade linux-gcp-5.4Upgrade linux-gcp-fipsUpgrade linux-oracle-5.4Upgrade linux-awsUpgrade linux-gkeopUpgrade linux-raspiUpgrade linux-fipsUpgrade linux-raspi-5.4Upgrade linux-oracleUpgrade linux-ibmUpgrade linux-aws-fipsUpgrade linux-hwe-5.4Upgrade linux-azure-5.4Upgrade linux-bluefieldUpgrade linux-gcpUpgrade linux-azureUpgrade linux-kvmUpgrade linux-aws-5.4 | Nov 19, 2024 | May 21, 2024 |
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