CVE-2026-74560

Local packet-processing disruption via AF_XDP buffer leak

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource leak in the Linux kernel allows local users to exhaust AF_XDP transmit buffers through malformed multi-buffer packets. xsk_drop_skb() cancels reserved completion-queue entries after consuming transmit descriptors, so their UMEM frame addresses are never returned to user space. Triggering the flaw requires a local AF_XDP application to submit an oversized packet, an invalid descriptor, or close an incomplete packet; repeated triggers can interrupt that application's packet processing.

CVSS severity3.3
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource leak in the Linux kernel allows local users to exhaust AF_XDP transmit buffers through malformed multi-buffer packets. xsk_drop_skb() cancels reserved completion-queue entries after consuming transmit descriptors, so their UMEM frame addresses are never returned to user space. Triggering the flaw requires a local AF_XDP application to submit an oversized packet, an invalid descriptor, or close an incomplete packet; repeated triggers can interrupt that application's packet processing.

The record

CVE
CVE-2026-74560
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.6
  2. Affected versionversion=cf24f5a5feeaae34c1a34d1e04f8ac697290427a <05e283466b86e0b25a5209a3eafe87aa9886064a
  3. Affected versionversion=cf24f5a5feeaae34c1a34d1e04f8ac697290427a <a0528ab6af62bf57153caaf8ea28e5fcb0e18fd4
  4. Affected versionversion=cf24f5a5feeaae34c1a34d1e04f8ac697290427a <a3c8382ebce4780c6b3ace2c09bc342313ac0186

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=cf24f5a5feeaae34c1a34d1e04f8ac697290427a <05e283466b86e0b25a5209a3eafe87aa9886064a; version=cf24f5a5feeaae34c1a34d1e04f8ac697290427a <a0528ab6af62bf57153caaf8ea28e5fcb0e18fd4; version=cf24f5a5feeaae34c1a34d1e04f8ac697290427a <a3c8382ebce4780c6b3ace2c09bc342313ac0186

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo