CVE-2026-43093
Description
AI Translation Available
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.
https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1
https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39
https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12
https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f
https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931