xdp: reject clones that overrun skb_shared_info tailroom

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74616
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:34 UTC
Updated2026-08-22 16:16:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xdp: reject clones that overrun skb_shared_info tailroom xdpf_clone() clones broadcast copies into a single page and sets frame_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that page like a normal XDP frame and expects the usual skb_shared_info tailroom at the end of the buffer. The current check only rejects frames whose linear xdp_frame header, headroom, and packet data exceed PAGE_SIZE. A source frame backed by a larger allocation can still satisfy that check while extending into the clone's required shared-info area. When such a clone is converted back into an skb, build_skb_around() places skb_shared_info over live packet bytes and later writes can corrupt XDP return metadata. Reject clones unless their linear area fits inside SKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already enforced by the XDP-to-skb conversion path.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 58408982fa39f9758124cec169f42854d6f98f35 git Not specified
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 685edea27ac68d08fe4dbd3de74b858d2ad8e830 git Not specified
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 ba13763d667e008e185fedf592d53846a5b457d1 git Not specified
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 ef4b7c7046d29a67090de15af0da0d1ae8d1b192 git Not specified
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 fab820f1691a9e26d9031f18aae1e9ce09078f92 git Not specified
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0 git Not specified
CNA Linux Linux affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 e48e8edbef2eb824201495daa5234560f632b23c git Not specified
CNA Linux Linux affected 5.14 Not specified
CNA Linux Linux unaffected 5.14 semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* 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/e48e8edbef2eb824201495daa5234560f632b23c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/58408982fa39f9758124cec169f42854d6f98f35 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/685edea27ac68d08fe4dbd3de74b858d2ad8e830 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fab820f1691a9e26d9031f18aae1e9ce09078f92 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ef4b7c7046d29a67090de15af0da0d1ae8d1b192 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ba13763d667e008e185fedf592d53846a5b457d1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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