xsk: validate launch-time metadata size

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74708
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: validate launch-time metadata size Launch-time metadata extends beyond the first 16 bytes of struct xsk_tx_metadata. Reject the request when the registered metadata area does not contain the complete field. Snapshot the validated flags for the generic transmit path and use that snapshot for request and completion processing, avoiding inconsistent decisions if user space changes the flags concurrently. Note that only xsk_skb_metadata is properly using the flags, __xsk_buff_get_metadata ignores them. Next commits address that.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 af511afa1d2977f384044df78d6fbf9fba653f7a git Not specified
CNA Linux Linux affected ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 bc63d47611c07b0d5d655fe1a590861931527920 git Not specified
CNA Linux Linux affected ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 439ce2dddf3d22129b9113a7881637256a35e936 git Not specified
CNA Linux Linux affected d9d736c416c9a85f84e15435ba82a177262e745b git Not specified
CNA Linux Linux affected 6.14.2 6.15 semver Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 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/439ce2dddf3d22129b9113a7881637256a35e936 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/af511afa1d2977f384044df78d6fbf9fba653f7a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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