7.8
High
CVE-2026-43093 In the Linux kernel, the following vulnerability has been resolved: xsk: tighten UMEM headroom validation to account for…
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 7.0 | earliest → < 7.0 | 7.0 |
| Linux 6.19 | earliest → < 6.19.14 | 6.19.14 |
| Linux 6.18 | earliest → < 6.18.24 | 6.18.24 |
| Linux 6.12 | earliest → < 6.12.83 | 6.12.83 |
| Linux 6.6 | earliest → < 6.6.136 | 6.6.136 |
| Linux 6.1 | earliest → < 6.1.175 | 6.1.175 |
| Linux 5.15 | earliest → < 5.15.209 | 5.15.209 |
| Linux 5.10 | earliest → < 5.10.258 | 5.10.258 |
| Linux | 5.7 | No fix stated |
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| Product | Affected versions | Fixed in |
|---|---|---|
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions not published |
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8.1
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