Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.19.118, < 4.20 |
References
- https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1Patch
- https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39Patch
- https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12Patch
- https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414fPatch
- https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931Patch
FAQ
What is CVE-2026-43093?
CVE-2026-43093 is a vulnerability with a CVSS score of 7.8 (HIGH). 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() coul...
How severe is CVE-2026-43093?
CVE-2026-43093 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43093?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.