xsk: drain continuation descs after overflow in xsk_build_skb()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74559
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:18:01 UTC
Updated2026-08-17 06:19:54 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xsk: drain continuation descs after overflow in xsk_build_skb() Fix generic xmit path multi-buffer logic when packets are either too big (count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is included in fragmented packet. Introduce xdp_sock::drain_cont and act upon this flag - when it is set, keep on consuming descriptors from AF_XDP Tx ring and put them directly onto Cq. Previously these descriptors were silently lost and could never be reached again.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.062830000 (date 2026-08-16)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cf24f5a5feeaae34c1a34d1e04f8ac697290427a ceb00cb87a22c42d20c39336213db2b843ca9e34 git Not specified
CNA Linux Linux affected cf24f5a5feeaae34c1a34d1e04f8ac697290427a 5e94d74e4f3baebaa083288f33b4be7ce0a34982 git Not specified
CNA Linux Linux affected cf24f5a5feeaae34c1a34d1e04f8ac697290427a bd44a6dcd4248883de90f5dad53ae80066e27096 git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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