In the Linux kernel, the following vulnerability has been resolved:
ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
ipvlan devices inherit hard_header_len from phy_dev during ipvlan_init(), but leave needed_headroom and needed_tailroom set to 0.
When the underlying phy_dev (or stacked lower device) requires extra headroom or tailroom for headers/trailers (e.g. macsec, ipsec, wireguard, tunnels, or veth with rx headroom), upper layers calculating packet headroom and tailroom fail to reserve sufficient space.
This can result in reallocation overhead, skb headroom underflows, or KASAN slab-use-after-free crashes when dev_hard_header() / ipvlan_hard_header() prepends header data or when lower devices append tailroom.
Fix this by: 1. Inheriting needed_headroom and needed_tailroom from phy_dev in ipvlan_init(). 2. Propagating needed_headroom and needed_tailroom updates to attached ipvlans in ipvlan_device_event() when receiving NETDEV_FEAT_CHANGE events.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-tools-develUpgrade bpftool6.18-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade perf6.18-debuginfoUpgrade python3-perf6.18Upgrade bpftool6.18Upgrade perf6.18Upgrade kernel6.18-develUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-debuginfoUpgrade kernel6.18Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.18-headersUpgrade kernel-livepatch-6.18.48-107.148Upgrade microvm-kernel6.18Upgrade kernel6.18-toolsUpgrade kernel6.18-modules-extra | Sep 30, 2026 | Aug 26, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Aug 27, 2026 | Aug 27, 2026 |
| Redhat_linux | — | No solution existsUpgrade kernel-rtUpgrade kernel | Aug 31, 2026 | Aug 26, 2026 |
| Rocky_linux | — | Upgrade kernel-rt-coreUpgrade kernel-rt-debug-coreUpgrade kernel-debuginfoUpgrade kernel-debug-modulesUpgrade kernel-debugUpgrade kernel-rt-modulesUpgrade python3-perf-debuginfoUpgrade kernel-debug-develUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-debug-debuginfoUpgrade kernel-tools-libsUpgrade kernel-coreUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-modulesUpgrade bpftool-debuginfoUpgrade kernel-rt-modules-extraUpgrade kernel-tools-debuginfoUpgrade kernel-modules-extraUpgrade kernel-debug-coreUpgrade bpftoolUpgrade python3-perfUpgrade kernel-rt-debugUpgrade kernel-rt-kvmUpgrade kernel-rt-develUpgrade kernel-develUpgrade kernel-debug-debuginfoUpgrade perfUpgrade kernelUpgrade kernel-rt-debug-develUpgrade kernel-rt-debug-modules-extraUpgrade kernel-tools-libs-develUpgrade kernel-debuginfo-common-x86_64Upgrade perf-debuginfoUpgrade kernel-debug-modules-extraUpgrade kernel-rt-debug-kvmUpgrade kernel-toolsUpgrade kernel-rtUpgrade kernel-rt-debuginfo | Oct 7, 2026 | Oct 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 15, 2026 | Aug 26, 2026 |
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