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CVE-2026-74616

xdp: reject clones that overrun skb_shared_info tailroom

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

In 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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in 58408982fa39f9758124cec169f42854d6f98f35; From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in 685edea27ac68d08fe4dbd3de74b858d2ad8e830; From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in ba13763d667e008e185fedf592d53846a5b457d1; From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in ef4b7c7046d29a67090de15af0da0d1ae8d1b192; From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in fab820f1691a9e26d9031f18aae1e9ce09078f92; From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0; From e624d4ed4aa8cc3c69d1359b0aaea539203ed266 · fixed in e48e8edbef2eb824201495daa5234560f632b23c

  • Linux Linux

    5.14

  • KernelLinux

    From 5.14.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.152; From 6.7.0 · fixed in 6.12.104; From 6.13.0 · fixed in 6.18.45; From 6.19.0 · fixed in 7.1.9

References 7

git.kernel.org