CVE-2026-43093

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.

The following products are affected by CVE-2026-43093 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-43093.

URL	Resource
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
https://lore.kernel.org/linux-cve-announce/2026050618-CVE-2026-43093-2e91@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-43093
https://www.cve.org/CVERecord?id=CVE-2026-43093