xsk: require at least 16 bytes of TX metadata

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Summary

CVECVE-2026-74710
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:45 UTC
Updated2026-08-22 16:16:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xsk: require at least 16 bytes of TX metadata AF_XDP accepts a TX metadata length as small as eight bytes, but every supported request needs the flags plus at least one eight-byte request field. Such short metadata also lets the kernel read beyond the registered area. Require 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve compatibility with applications that do not use launch-time metadata.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 341ac980eab90ac1f6c22ee9f9da83ed9604d899 21b8536aee819792f1b4b38b9aacf2a073025d49 git Not specified
CNA Linux Linux affected 341ac980eab90ac1f6c22ee9f9da83ed9604d899 642c6e73fce17fdca93a5793c4d22359fda866d7 git Not specified
CNA Linux Linux affected 341ac980eab90ac1f6c22ee9f9da83ed9604d899 cfb9d2976b277e554e28c165e3eff4b4a8ea10bd git Not specified
CNA Linux Linux affected 341ac980eab90ac1f6c22ee9f9da83ed9604d899 1bb30b181d9f0484e141f8411e15ed906d5c6780 git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/642c6e73fce17fdca93a5793c4d22359fda866d7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cfb9d2976b277e554e28c165e3eff4b4a8ea10bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1bb30b181d9f0484e141f8411e15ed906d5c6780 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/21b8536aee819792f1b4b38b9aacf2a073025d49 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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