Answer in brief
CVE-2026-74616 records a Critical severity (CVSS 9.8) vulnerability in xdp: reject clones that overrun skb_shared_info tailroom. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <58408982fa39f9758124cec169f42854d6f98f35 || >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <685edea27ac68d08fe4dbd3de74b858d2ad8e830 || >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <ba13763d667e008e185fedf592d53846a5b457d1 || >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <ef4b7c7046d29a67090de15af0da0d1ae8d1b192 || >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <fab820f1691a9e26d9031f18aae1e9ce09078f92 || >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0 || >=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <e48e8edbef2eb824201495daa5234560f632b23c | 58408982fa39f9758124cec169f42854d6f98f35, 685edea27ac68d08fe4dbd3de74b858d2ad8e830, ba13763d667e008e185fedf592d53846a5b457d1, ef4b7c7046d29a67090de15af0da0d1ae8d1b192, fab820f1691a9e26d9031f18aae1e9ce09078f92, f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0, e48e8edbef2eb824201495daa5234560f632b23c |
| Linux/Linuxgeneric | 5.14 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.