High · published May 6, 2026
In the Linux kernel, the following vulnerability has been resolved:
xsk: tighten UMEM headroom validation to account for tailroom and min frame
The current headroom validation in xdp_umem_reg() could leave us with
insufficient space dedicated to even receive minimum-sized ethernet
frame. Furthermore if multi-buffer would come to play then
skb_shared_info stored at the end of XSK frame would be corrupted.
HW typically works with 128-aligned sizes so let us provide this value
as bare minimum.
Multi-buffer setting is known later in the configuration process so
besides accounting for 128 bytes, let us also take care of tailroom space
upfront.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.19.118, < 4.20 | 4.20 |
| linux/linux_kernel | ≥ 5.4.35, < 5.5 | 5.5 |
| linux/linux_kernel | ≥ 5.6.7, < 5.7 | 5.7 |
| linux/linux_kernel | ≥ 5.7.1, < 6.6.136 | 6.6.136 |
| linux/linux_kernel | ≥ 6.7, < 6.12.83 | 6.12.83 |
| linux/linux_kernel | ≥ 6.13, < 6.18.24 | 6.18.24 |
| linux/linux_kernel | ≥ 6.19, < 6.19.14 | 6.19.14 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |