CVE-2026-43093High· 7.8▾ TwilightIn 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 de…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
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.
linux_kernel >= 4.19.118, < 4.20linux_kernel >= 5.4.35, < 5.5linux_kernel >= 5.6.7, < 5.7linux_kernel >= 5.7.1, < 6.6.136linux_kernel >= 6.7, < 6.12.83linux_kernel >= 6.13, < 6.18.24linux_kernel >= 6.19, < 6.19.14linux_kernel = 5.7linux_kernel = 7.0Upgrade past the affected range:
linux_kernel 6.19.14Connected by shared product, vendor, weakness, or advisory.
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