CVE-2026-74616Network attack vector

Kernel memory corruption via XDP clone overlap

Published Aug 22, 2026 · Updated Aug 25, 2026

Out-of-bounds writes in Linux kernel XDP allow remote attackers to corrupt kernel memory via crafted broadcast-redirected frames. xdpf_clone() accepts a linear frame area up to PAGE_SIZE even though the clone shares that page with required skb_shared_info tailroom, so build_skb_around() overlaps metadata with live packet bytes. Reachability requires an ingress XDP program using BPF_F_BROADCAST; successful packets can expose adjacent data, corrupt return metadata, or panic the kernel.

CVSS severity9.8
Critical
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds writes in Linux kernel XDP allow remote attackers to corrupt kernel memory via crafted broadcast-redirected frames. xdpf_clone() accepts a linear frame area up to PAGE_SIZE even though the clone shares that page with required skb_shared_info tailroom, so build_skb_around() overlaps metadata with live packet bytes. Reachability requires an ingress XDP program using BPF_F_BROADCAST; successful packets can expose adjacent data, corrupt return metadata, or panic the kernel.

The record

CVE
CVE-2026-74616
Published
Aug 22, 2026
Updated
Aug 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-122, CWE-788, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.14
  2. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <58408982fa39f9758124cec169f42854d6f98f35
  3. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <685edea27ac68d08fe4dbd3de74b858d2ad8e830
  4. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <ba13763d667e008e185fedf592d53846a5b457d1
  5. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <e48e8edbef2eb824201495daa5234560f632b23c
  6. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <ef4b7c7046d29a67090de15af0da0d1ae8d1b192
  7. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0
  8. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <fab820f1691a9e26d9031f18aae1e9ce09078f92

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <58408982fa39f9758124cec169f42854d6f98f35; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <685edea27ac68d08fe4dbd3de74b858d2ad8e830; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <ba13763d667e008e185fedf592d53846a5b457d1; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <e48e8edbef2eb824201495daa5234560f632b23c; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <ef4b7c7046d29a67090de15af0da0d1ae8d1b192; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <fab820f1691a9e26d9031f18aae1e9ce09078f92

Published CVSS scores

9.8Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-788Access of Memory Location After End of Buffer
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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