CVE-2026-74707
Description
In the Linux kernel, the following vulnerability has been resolved: xsk: validate metadata when processing requests The zero-copy path validates TX metadata while obtaining the descriptor context, then reads it again later when preparing the hardware request. User space can change the metadata between those operations and bypass the original validation. Validate the metadata in xsk_tx_metadata_request() and use the resulting flags snapshot for every feature check. Read request fields once so all zero-copy drivers process only values observed after successful validation.
How to fix
- Linux Linux5fd121971912dee2f5af1efec64462ac722deb17, 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba, 849b1664dbda1cf6c63e0fd4f9dec23782b8c851, 6.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 ≤ v < 5fd121971912dee2f5af1efec64462ac722deb17, ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 ≤ v < 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba, ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 ≤ v < 849b1664dbda1cf6c63e0fd4f9dec23782b8c851, d9d736c416c9a85f84e15435ba82a177262e745b, 6.14.2 ≤ v < 6.15, 6.15 | 5fd121971912dee2f5af1efec64462ac722deb17, 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba, 849b1664dbda1cf6c63e0fd4f9dec23782b8c851, 6.15 |
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