CVE-2026-74707: Linux Kernel xsk Zero-Copy Metadata Validation Bypass
CVE-2026-74707 Published on August 22, 2026
xsk: validate metadata when processing requests
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.
Products Associated with CVE-2026-74707
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 and below 5fd121971912dee2f5af1efec64462ac722deb17 is affected.
- Version ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 and below 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba is affected.
- Version ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 and below 849b1664dbda1cf6c63e0fd4f9dec23782b8c851 is affected.
- Version d9d736c416c9a85f84e15435ba82a177262e745b is affected.
- Version 6.14.2 and below 6.15 is affected.
- Version 6.15 is affected.
- Before 6.15 is unaffected.
- Version 6.18.45, <= 6.18.* is unaffected.
- Version 7.1.9, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.