CVE-2026-43093
Description
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.
How to fix
- linux linux_kernel4.20, 5.5, 5.7, 6.6.136, 6.12.83, 6.18.24, 6.19.14 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.19.118 ≤ v < 4.20, 5.4.35 ≤ v < 5.5, 5.6.7 ≤ v < 5.7, 5.7.1 ≤ v < 6.6.136, 6.7 ≤ v < 6.12.83, 6.13 ≤ v < 6.18.24, 6.19 ≤ v < 6.19.14, 5.7, 7.0 | 4.20, 5.5, 5.7, 6.6.136, 6.12.83, 6.18.24, 6.19.14 |
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