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.
Affected products
linux: linux kernel
References9
- git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1 Patch
- git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39 Patch
- git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12 Patch
- git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f Patch
- git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931 Patch
- git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67
- git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384
- git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 13 November 2026
- CWE
- CWE-787
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