CVE-2026-74260

Service interruption via cross-CPU recursion-counter imbalance

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in Linux kernel netfilter 6.16 through 7.1.4 allows local users to interrupt service via nft_dup or nft_fwd packet transmission. nf_dup_netdev transmits an skb without disabling bottom halves while recursion accounting is CPU-local, so migration can decrement a different CPU's counter. A local low-privileged account and configured nft_dup or nft_fwd rules are required; the published impact is limited to availability.

CVSS severity4.7
Medium
EPSS probability0.15%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux kernel netfilter 6.16 through 7.1.4 allows local users to interrupt service via nft_dup or nft_fwd packet transmission. nf_dup_netdev transmits an skb without disabling bottom halves while recursion accounting is CPU-local, so migration can decrement a different CPU's counter. A local low-privileged account and configured nft_dup or nft_fwd rules are required; the published impact is limited to availability.

The record

CVE
CVE-2026-74260
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

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Is a vulnerable build present?

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

  1. Affected versionversion=6.16
  2. Affected versionversion=f37ad91270397a6d053e8623bdb3cf79859691d2 <2354e975932dabb06fad239f07a3b68fd1809737
  3. Affected versionversion=f37ad91270397a6d053e8623bdb3cf79859691d2 <edf234f71fb327792196f813048ab8f5bd3bb712

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=f37ad91270397a6d053e8623bdb3cf79859691d2 <2354e975932dabb06fad239f07a3b68fd1809737; version=f37ad91270397a6d053e8623bdb3cf79859691d2 <edf234f71fb327792196f813048ab8f5bd3bb712

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application 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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